All posts by Monica Frisch

April – first few days of May 2019 – Rook revival

How did I miss them? Perhaps a tree was obscuring the view and it was removed/felled over the winter or was it just observer failure! The rookery in Cherry Hinton Hall was again 10 Apparently Active Nests (AANs) but a new rookery has appeared about 75 m away in Walpole Road with 12 apparently active nests. They were obvious so how did I miss them!? I didn’t, I hadn’t; Roger (Horton) and Duncan (McKay) both confirmed that this was a new colony. All the Rookeries in our NatHistCam study area have maintained numbers or increased; this year the total count of AANs was 134 (2018 – 111; 2017 – 108).

Early Common Terns were seen at Hobson’s Park on 9th April, a pair along Riverside on 28th April (Rob Pople) and a pair noisily patrolling the northern edge of our study area at Milton Country Park on 2nd May. I do not know where the Riverside birds breed but they might be from Hobson’s Park.

Late Teal were at Eddington in the early part of the month but are easily disturbed to the ditches closer to the M11 where they may breed.

Male Teal at Eddington
Early juvenile Green Woodpecker at Milton Country Park (Trevor Kerridge)

The pair of Nuthatches were again seen at Girton College (Jon Heath) but nowhere else in the City despite searches. A dead Tawny owlet, almost fledged, was found in Jesus College grounds on 1st April (Rhona Watson) and a vigorous living owlet was at Girton College on 2nd April (Duncan McKay); a Chiffchaff in Gilbert Road on a cool damp evening on 2nd May and a Willow Warbler was singing in Tenison Road on 12th April (Martin Walters). On 2nd April two Swallows were near Darwin Green and on 18th April two Swallows were over Oxford Road but numbers of hirundines have been few; the regular nesting pair under the A14 bridge near Horningsea were seen on 2nd May and birds over Milton Country Park on the same day. Bullfinches are breeding in a garden in Huntingdon Road.

Throughout most of April Blackcaps were the commonest songbirds across the City. I have never heard so many – every suitable copse, clump of trees hedge, wayside shrubs or wooded garden seemed to have a singing male. Mill Road cemetery had four singing Blackcaps, two Chiffchaffs (and two singing Greenfinches) on 16th April.

Female Blackcap – bumper spring for this bird

There has been an interesting sequence of inland records in Cambridgeshire of Little Gulls and Arctic Terns this April but few coastal records from Norfolk or Suffolk of these pelagic species. Numbers of Little Gulls recorded at Grafham Water peaked at 37 on April 11th and 32 Arctic Terns at RSPB Fen Drayton on 27th April. I have seen large numbers of Little Gulls following the French and Dutch coasts north in spring to their breeding grounds in Scandinavia taking advantage of the prevailing south westerly winds. This April easterly winds might have stalled their passage round the coasts so they may have taken the short cut overland to the North Sea to avoid rounding the English Channel. This might add weight to the theory that overland passage following the SW/NE (NE/SW in autumn) trajectory of our major East Anglian river valleys – Ouse, Cam, Nene – is a regular overland migration flyway.

On 16th April a well fledged sub-adult Mistle Thrush was in the next field to 50 Fieldfares in the Fen Road meadows. Two Oystercatchers flew over the Botanic Gardens on 18th April (Nets Shelford) and again on 28th April (Rob Pople) – possibly the same birds; this species, exploring potential inland nest sites over our study area, occurs most springs.

On 17th April winds changed to gentle south easterlies and many spring migrants must have arrived. Rob Pople recorded 2 Reed Warblers at the Sanctuary in Adams Road on 28th April and I heard my first Whitethroats and a Garden Warbler in our study area on 2nd and 3rd May; Lesser Whitethroats were heard by the Milton cycle bridge, in the bushes by the Sewage Works and near Cambridge North Station on 2nd May. The first Swift was over the City on 1st May.

A possible new housing development in our study area next to Darwin Green may advance beyond the Huntingdon Road/Histon Road boundary footpath. I knew this land as Green Belt but there are proposals from Barratt Homes to build houses, and possibly a new school, up to the A14; this land was ‘scoped” by archaeological surveyors early this year. It has two pairs of breeding Grey Partridge and other Red Listed Farmland species including Yellowhammer, Linnet, and Yellow Wagtail; Barn Owls hunt this farmland regularly and a pair of Kestrels nest there. In 2016 four pairs of Lapwings nested – the first time in (at least) 50 years.

bobjarman99@btinternet.com – 3rd May 2019

March 2019 – “The Ravens have left the Tower”

Thirty-four Rooks nests were under construction in Girton College – it’s difficult to get an exact count as many are concealed in the canopy of a Scots Pine. Rooks used to be abundant in college grounds in West Cambridge and the “Backs” but this is the only college rookery in the City. “It’s as if the Ravens have left the Tower” said a friend who knew the area well in childhood. The Long Road rookery has 10 nests – the other rookeries in our study area have yet to be checked.

Rooks at Girton College

There is a rather dubious alleyway between Oasis and Gap that opens onto the Market Square – if unlocked it’s an excellent place to see Grey Wagtails! A pair was displaying there on 5thMarch and I suspect they nest on the roof of MnS.

On 6th March, at least 70 Lesser Black-backed Gulls were resting on the gravel exposures at Darwin Green. If left undeveloped this looks an opportunity for breeding Little-ringed Plovers. The area is secure so birding is difficult.

An early House Martin was over Trumpington Meadows on 10thMarch (Jill Aldred – cbcwhatsabout.blogspot.com) and a Chiffchaff was singing in the orchard at Milton Country Park on 10th March; a few Widgeon were still there on 28thMarch and Great-crested Grebeswere displaying. Three or four Chiffs and Treecreeper were singing at Byrons Pool on 17thMarch and four Buzzards were overhead.

A ‘clasp’ of frogs in a garden pond – 18th March
Great Crested Grebes, Milton Country Park

Trumpington Meadows had 60+ Golden Plovers on the nearby arable and two Grey Wagtails also on 17th March with lots of Coltsfoot and Cowslips in flower and flowering Gorse (probably introduced) near the bridge over the M11. Iain Webb gave an excellent talk to the Wildlife Trust members about Trumpington Meadows as it develops as a Trust reserve on the edge of an urban development. He said that 105 bird species had been recorded so far – a notable exception was House Sparrow. In the mid-1970’s when this area was part of the trials ground of the Plant Breeding Institute (PBI) flocks of hundreds (possible a thousand) of, mostly juvenile, House Sparrows would descend on the ripening winter wheat trials compromising the yield results. There was a dedicated sparrow killer who would chase flocks into a funnel trap and …. kill them! It seemed to make no difference to numbers. It was probably the change to winter arable sowings – winter wheat, winter barley and winter oilseed rape – and the loss of over-winter weedy stubbles that caused the extinction of countryside House Sparrows in our project area.

On the 18th March 5 Buzzards were over the A14 at the Histon interchange plus another single bird nearby.

Peter Bircham counted 100+ Snipe at Hobson’s Park on 19thMarch, two Corn Buntings were singing, Skylarks were very active, 50+ Grey-lag Geese were present and Black-headed Gulls were displaying – the islands have been strimmed (thanks, Guy Belcher), making ideal nest sites for the gulls and hopefully returning Common Terns. On the same day three Buzzards were over Homerton College and on 21stMarch two Buzzards were over Storeys Way.

The Riverside to Jesus Lock Black-headed Gulls had mostly left by 21st and night flying Redwings were heard on the 21stand 22ndMarch over Castle Hill and Mitcham’s Corner.

Skylark– Hobson’s Park
Buzzard over Chesterton


On 23rd March a concerted search for Nuthatches in the “Backs” found none despite the conditions looking ideal especially in St John’s College gardens; the day before four territories were located in Gamlingay wood by calls and sightings. The timing and conditions look right in the “Backs” but the birds are just not there. Also on 23rd March the female Peregrine was back at the City centre site. On 24th March 2 Blackcaps were singing in Robinson College, a Water Vole in the ditch behind King’s College and a pair of Mandarin Ducks near Byron’s Pool (Richard Palmer – cbcwhatsabout.blogspot.com). These may have been birds disbursed from the colony at Wimpole.

On 28thMarch ten Chiffchaffs, and two Blackcaps were singing between Riverside and the A14 bridge at Horningsea including one Chiff behind Newmarket Road Tesco’s. Blackcap and a Chiff were heard in Huntingdon Road on 29thMarch.

My first of the year Holly Blue butterfly in Cherry Hinton on 29th March and a Buzzard was disturbed by crows from a tree at the end of Union Lane near the junction with Chesterton High Street.

Two Buzzard flew high over Elizabeth Way on 29th March and Chiffs were singing in Logan’s Meadow and Gough Way; three Buzzard were seen over Girton College on 31stand a Blackcap and Treecreeper were heard singing in the college grounds. A Blackcap was singing along Newnham Road in the tree where the burger van parks in the evening!

It has been a month of singing Chiffchaffs and Blackcaps and possibly 17 different Buzzards over our project area. The number of Buzzards is remarkable considering the first confirmed breeding, for many years,in the County occurred just 20 years ago in 1999.

bobjarman99@btinternet.com – 31st March 2019

March Sightings 2019

Frogs

The first Frogspawn was recorded in Girton on Feb 27th (Ben) and then there were a slew of sightings between Mar 2ndand 4th (Pam, Simon, Guy, Simon, Val). Simon’s happy couple were spotted on 2nd while Pam’s March 4th spawn had become Tadpoles by 23rd.

Mating frogs    Simon Mentha
Frog guarding frogspawn    Pam Gatrell

Veronica reports activity at Newnham Croft School: 100 saplings have been planted in the wild area and the children have under-planted there with snowdrops and aconites.  The school maintenance team have cut back dead branches and cleared ivy and brambles, to open it up until the canopy recovers.  Sadly, a Muntjac deer population have moved in and are munching their way through the vegetable plot and flower beds. The children have witnessed Deer, Moles, a Fox that has its route along the back of the school grounds and a Pheasant that has taken a liking to the wheat bed. There are many more crows and magpies this year.

Birds

Richard has a grandstand view of the new nature reserve and lake at Great Kneighton. He comments on the activities of Black Headed Gulls, pestering Little Grebes and forcing them to dive repeatedly until they finally give up their catch. Sometimes the gull sat on the water waiting for the grebe to surface, but on occasion flew around, perhaps able to see the grebe under the water. Having watched this, he was then astonished to observe a Cormorant getting the same treatment from the much smaller gull!  Also, Black Headed Gulls mobbed and evicted a Lesser Black-backed Gull that had settled on ‘their’ pontoon.  Aggression certainly pays.

Newnham’s Heronry is again occupied. Mike reports 2 nests, each with at least one juvenile by 26th (begging calls) and on 18th a pair were spotted mating at 6 am. Birdsong begins about 5.15 am and a Blackbird in Owlstone Rd seems to be singing virtually round the clock. Newnham also has masses of Song Thrushes and Chiffchaff  were heard in Paradise March 23rd .

Plants

Jonathan noted Holly Leaf-miner Phytomyza ilicis, while working at West Pit.  He thinks it will be present elsewhere in the city, though doesn’t recall seeing it before. Have you seen any? Liza reports a non-native plant on Empty Common, called Nonea lutea, belonging  to the borage family.  It looks like a primrose-yellow lungwort and has most likely seeded over from the Botanic Garden. Jonathan confirms it is “wild” there, with a couple of records from Cambridge and nine in the county as a whole.  Has anyone else seen it growing wild?  

Nonea lutea    Liza Steel

Invertebrates

At last, some of the blossom may have coincided with the emergence of pollinators.  There have been lots of bees and Trevor records “Watching a very large Bumble Bee [no white rump] with my 5 year old grandson. It was making very slow progress across the staging in my greenhouse. Twice it fell over on its back and after righting it, it fell over again, then delighted my grandson by sending out a stream of presumably urine, at least ten inches into the air.  I was most impressed by the volume, probably the result of a whole winter sleep.” Wow!

Other invertebrates include a Hawthorn Shield Bug Acanthosoma haemorrhoidale,


Hawthorn Shield Bug     Pam Gatrell

Queen Wasps coming out of hibernation, a Yedoensis prunus alive with dozens of bees, including Buff Tails and Solitary Bees (Pam). Several people have noted that it is a bumper year for 7-Spot Ladybirds.  I have not seen any Harlequins yet.

Muslin Moth   Paul Rule
Oak Beauty   Paul Rule 

On 15th the most attractive of winter moths finally turned up in Paul’s garden, the Oak Beauty. Then, the first Muslin Moth seen this year, which despite appearances, was only playing dead.

Butterflies in March

Brimstone (June, Val, Suki, Rhona, Paul), Holly Blue (June, Paul, Rhona), Peacock (Rhona, Suki, Paul, Ben), Small Tortoiseshell (Paul, Ben), Comma (Paul), Large White (Suki), Red Admiral (Suki), and Speckled Wood (Rhona) add up to a good tally for the month.

Speckled Wood     Rhona Watson

On 21st March, Ben’s hibernating Hedgehog emerged bang on time for the solstice.  On 29th, Paul found this one sniffing around the moth trap. March is the month when they emerge from hibernation and I am waiting for another one to re-home.

Emerging Hedgehog     Paul Rule

Finally, I am not sure what to make of: “Just to report a very dizzy small groundswell in my garden (CB4)”. A bad case of Google Auto-Confuse or tiny earthquake in North Cambridge?

Garden Birding

My garden lies on the northern boundary of Cambridge. The garden is a decent size; containing a pond, mature shrubs/trees, with also a fair amount of visible sky. It is surrounded by further residential areas to the south and the rapidly developing Cambridge Science Park to the north. Over the past 20 years I have watched and documented the birds coming into and flying over the garden. Recently this has also included monitoring migrating birds flying over at night in the spring and autumn (‘nocmig’). To date (March 2019) my garden list stands at 105 species, with an additional 18 species ‘sound-recorded only’.

Waxwing – Feb 2010
Reed Warbler – May 2016
Ring-necked Parakeet – Sep 2013

The key to garden bird listing is to learn which time of year / weather conditions are best and then to concentrate observation effort at these important points. Autumn is generally the most the productive time of the year. Late August and early September sees the best chance of finding unusual garden warblers; including Reed Warbler, Sedge Warbler and Spotted Flycatcher. Late September through to early November is the key time to observe visible-migration (‘vismig’). On days with preferable conditions (overcast with light northerly or easterly winds) hundreds, sometimes even thousands, of Redwing and Fieldfare can pass over. Common migrants moving with the thrushes will often include Meadow Pipit, Skylark, Reed Bunting, Pied Wagtail, Lesser Redpoll and Siskin. There is, however, always the chance of something a bit rarer passing over, and at this time in the past few years Hawfinch and Merlin have been seen over.

Merlin – Oct 2017
Short-eared Owl – Mar 2017
Great Crested Grebe – Feb 2016

Winter generally provides a more standard set of garden birds. There is often little change, though regular watching of feeders can turn up Redpoll or Siskin, or better yet a Brambling. Blackcaps are now fairly common winter visitors to Cambridge gardens, and are frequently attracted to cut apples. Harsh winter weather can produce unusual species such as Fieldfare turning up in the garden, while it’s also a good time to look for weather-displaced birds flying over such as Lapwing and Golden Plover, or even Woodcock.

Migration kicks in again with the onset of Spring, with it now the time to listen out for singing migrants including Chiffchaff and Blackcap and then Whitethroat and Lesser Whitethroat later in the season. Last year I was lucky enough to hear my first Cuckoo singing in the distance. Warm, sunny spring days are often the best time to ‘sky-watch’ for soaring raptors. Buzzards are now very regular, with Red Kites becoming increasingly common and Marsh Harriers nearly annually seen. One spring sky watching session miraculously provided a high-flying Short-eared Owl and warm conditions in the past week produced another new garden addition – 4 soaring Common Cranes!

Osprey – Aug 2014
Mediterranean Gull – July 2013
Marsh Harrier – Oct 2013
Common Crane – Feb 2019

Jon Heath March 2019

Late February 2019 – the Heat is ON!

Eighty plus Redwings on Newnham recreation ground, on 12th February, is a typical pre-migration gathering. At this time, they often associate in a tree or dense scrub and engage in a peculiar muted sub-song. Dave the groundsman at the CURUFC (Rugby Club) says there is a regular Barn Owl hunting over the training ground and rough pasture behind the Grange Road pitch. I had a look at this area which is hard farmed arable – good hedges but few headlands – the crops have been drilled right up to the hedges and footpath But, there was a pair of Kestrels and over towards the M11 a pair of Buzzards. A pair of Kestrels opposite Paradise also.

I carry out a regular bird survey for a farm in the north of our project area close to the A14. The most productive hedge is the one illustrated below. I does not look much – a drainage ditch that has become over grown, mostly, with bramble and some hawthorn but it is the 8m field margins on both sides of the hedge that gives it added bird value. It always has several pairs of Yellowhammers, Linnets, Meadow Pipits, occasionally Stonechat and Grey Partridge nearby.

Nuthatch – Lower Wood; Duncan MacKay

I have been looking and listening for Nuthatches! The 1994 Atlas of the Breeding Birds of Cambridge says the “Backs” hold a small population, the most recent Atlas – 2007-2011 – show no confirmed breeding records for Cambridge and our NathistCam project area. I have one recent record from Girton (Stuart Rosell) and that’s it! The habitat around the “Backs” looks ideal, as good any wood such as Buff and Gamlingay, in west Cambridgeshire, but I’ve found none. I have also looked and listened in the Botanic gardens but none there too, just a pair of Muntjacs! Nor can I understand why there are none! Records please!

Brambling in the Beechwoods
February 2018

On the 18th February about 15 Bramblings at the Beechwoods, including a male going into striking summer plumage. I find then difficult to see rummaging in the beech leaf litter – they are always with the Chaffinches.

Brambling Paxton Pits late April 2018

See a Chaffinch and you see the Bramblings even if it’s just their striking white rumps as they fly into the trees. They are serious rummagers and throw the beech leaves about in their search for seeds. The best views were immediately on entering the wood, near and just beyond the cycle rack but here they are most prone to disturbance from dog walkers. They often stay well into April.

This image has an empty alt attribute; its file name is GreenSandpiper-1.jpg
Green Sandpiper at farm reservoir in project area

Sparrowhawks have been displaying over Histon Road, Grange Road and Logan’s Meadow. A Green Sandpiper on a small farm reservoir on 20th February could have been the same overwintering individual I saw in a near by ditch last October. Rhona Watson has recorded active breeding behaviour of Mistle Thrushes in Jesus College grounds and Peregrines have been reported over the out-of-city nesting site.

On 22nd February one singing Corn Bunting at Hobson’s Park and a Jack Snipe. It was only the second time I have seen Jack Snipe on the ground feeding – they have a peculiar “bouncing” gait that presumably agitates worms and grubs nearer the surface. There were also about 200 Black-headed Gulls,some were displaying nesting behaviour.

Credible reports of a Mink running along Greystoke Road and into gardens in Queen Edith’s Way and a dead adult Badger along Barton Road. Roy has seen a Muntjac in the gardens of Gresham Road and a Red Fox walking across the University cricket pitch.

Brian Eversham introduced the recent Monitoring and Research Conference for the Wildlife Trust (Beds, Cambs, Northants). He predicts that Great-spotted Cuckoo would be one of the next new species to colonise due to climate change – they parasitise Magpies (not a bad thing!). He also described a new flora by Sell and Murrell (2018) that treats 62 recognisable forms of Elms as new named species. He described a copse near Cambourne with 12 species of Elms– this is more than the whole of France with just 8 species! I thought/assumed that all elms were dead because of Dutch Elm disease. Not at all; Duncan MacKay has located elms in the College gardens,some of which are the tallest trees in the City. Brian Eversham also mentioned Nathusius’ Pipistrelle, also influenced by climate change, which is a migratory bat; it’s a summer visitor to the UK and returns to the continent to hibernate over winter.

Iain Webb described that transition of Trumpington Meadows from the Plant Breeding Institute (with picture of Dr Francis Lupton next to winter wheat trial plots) to recreational grassland and nature reserve. He also described the Dung Beetle Monitoring Project (DUMP!) which searches for dung beetles in cow pats. John Showers described the Diptera (flies) – there are 7,100 species in the UK alone; the larva of one is vividly called the Rat-tailed Maggot. A summary of the Wetland Bird Surveys (WeBS) by Neil Calbrade showed Gadwall ducks increasing but Mallards declining.

It was only a matter of time before Common Craneswere seen over Cambridge from the expanding Cambridgeshire breeding population – four flying north on 24thFebruary (www.cbcwhatsabout.com). 

The first flowering Blackthorn I saw was on 18thFebruary and a Brimstone on the 23rdFebruary. The remarkable hot weather produced a UK “hottest” February temperature of 20.6C on 25thFebruary at Trawscoed in Wales. I used to visit Trawscoed in the late1960’s and early 1970’s to see the Red Kites. 

Red Kite over Orchard Park

This relic population was hanging on after year of persecution and before the reintroduction of Red Kites in the Chilterns in the mid1970’s. To see Red Kites now, in and over Cambridge, is astonishing; one over the A14/Orchard Park on 18thFebruary and one near Darwin Green on 20thFebruary. Years later using DNA technology it was discovered the Welsh population was suffering inbreeding-depression and all shared the DNA of a single female bird of German heritage!

Blackcaps have been heard singing a quiet sub-song before the breeding season get underway off Huntingdon Road and next to the railway bridge over the river in Chesterton. The birch coppice opposite Cambridge North Station that had singing, and probably breeding, Willow Warblers in 2018 is being grubbed out for a prestige office development.

Radio 4 last Sunday On Your Farm: 6:35am– listen to it on catch-up/iPlayer “Farming for Wildlife”:Cambridgeshire (St Neots) farmer Martin Lines describes the Nature Friendly Farming Network and how he actively encourages birdlife and other wildlife and runs a profitable commercial farm.

 BobJarman 1st March 2019 bobjarman99@btinternet.com

Hobson’s choice or Hobson’s Park!

If I have a choice where to go its Hobson’s Park ………at the moment!. It used to be called Clay Farm. Countryside Properties who,I think, are the agents/builders of Great Kneighton (the “e” before the “i”!) have created a recreational area and nature reserve between the new village and the railway line. The nature reserve will eventually be handed over to the City Council, as will, I expect, the area set aside for allotments. From Chesterton to Hobson’s Park on the southern edge of our NatHistCam project area is an easy cycle ride for me mostly along the guided bus routes out into “big-sky-country” and also to the nearby chalky arable escarpment of Nine Wells.

John Meed has been studying Nine Wells for several years as it is threatened by the expansion of Addenbrookes. He has counted: 33 pairs of Skylarks, 17 pairs of Linnets, 15 pairs of Grey Partridges (73 birds there in November 2017 – Cambridgeshire Bird Club Annual Report No 91, 2017), 14 pairs of Yellowhammers, 6-7 pairs of Corn Buntings and 1-2 pairs of Yellow Wagtails – all Red Listed bird species. It is a remarkable list of threatened farmland birds on the edge of our City.

Corn Bunting Hobson’s Park 
Linnet at Hobson’s Park 

Hobson’s Park looks as though it might extend the habitats at Nine Wells with the addition of a wetland nature reserve. Corn Buntings are already singing there on sunny days so too are Skylarks; 12 Linnets seem to be resident and a pair of Stonechats can be seen on most visits (see December 2018 blog). On/around the wetland site are +/- 60 Common Snipe, 4-5 Jack Snipe (several observers), a male Bearded Tit (since mid-November) which gives the best views of this species you could wish for (but it can be elusive and often feeds on the ground at the base of the reeds), 3 Little Egrets, Kingfisher,Water Rail, Kestrel and an assortment of ducks. A Jack Snipe was also seen at Eddington on 24thJanuary (Boris Delahaie, www.cbcwhatsabout.blogspot.com)

Water Rail – taken at Welney

Bramblings are uncommon winter visitors to Cambs. According to Iolo Williams on Winter Watch there has been a Brambling invasion into the UK this winter due to a shortage of beech mast in Europe. Beech mast is their staple winter food. The Brecklands around Brandon have big flocks most winters and reported numbers in Cambs, this winter, have been about average – the flock of 40+ in the Beechwoods is unusual but not exceptional. In January 2018, I spent the New Year in 2017/2018 in Israel and saw large flocks of Bramblings on the very southern limit of their winter range in the Golan Heights and along the eastern edge of the Sea of Galilee – a bird I did not expect to see there – and not a Beech tree in sight!

The cold weather in the last week of January and the first few days of February has brought winter thrushes – Fieldfares and especially Redwings – into the city to feed on berries. On the 1st February, there was a flock of 150+ over the Elizabeth Way roundabout at the junction with Newmarket and East Roads – I could not work out where they had been feeding. Large numbers of Redwings were also“casing” Orchard Park for berry bearing street trees and bushes on Saturday 2ndFebruary. Signs of a Hedgehog around my garden were good but also bad because it should have been hibernating.

Song Thrush at Orchard Park 
Redwing at Orchard Park

A male Blackcap was in Tenison Road on 1stFebruary (Martin Walters), 60+ Skylarks on part of the Darwin Green development that is still mown pasture and waiting for the JCB’s, and a Red Fox behind the gardens in Tavistock Road.

Shoveller at Eddington

Bob Jarman 4th February 2019 bobjarman99@btinternet.com

NatHistCam and the Dead Sea connection

Jon Heath’s discovery of the Siberian sub-species of  Chiffchaff (Phylloscopus collybita tristis) near the Orchard at Milton Country Park (MCP) was a brilliant find and just falls into the north of our NatHistCam project area. Cryptic grey plumage and its distinctive “peep” call, not the usual Chiffchaff “hooeet”, were the clinching identification features. The bird was found on 10thDecember 2018 and last recorded on 2nd January 2019 (Nigel Butcher, www.cbcwhatsabout.blogspot.com). I tried looking for it on 6th January in a tit flock but had no luck. Up to four Chiffs (Phylloscopuscollybita collybita) have also been seen.

I spent the New Year in Jordan on the Dead Sea coast. Chiffchaffs were common in the hotel gardens and I think they were all this Siberian subspecies; single birds called with a plaintive “peep” as if they had been grabbed by their rear body and squeezed! Birds feeding in loose groups of 3-4 birds never called; only isolated individuals. At first, I thought individuals might be Caucasian Chiffs (Phylloscopus lorenzii) but they lacked a clear white supercillum and brown plumage. Future DNA analysis might confer species status to this Siberian race. None of the Dead Sea birds looked as grey as Jon’s bird but all called with a “peep”. Illustrations in two field guides suggest this subspecies is polymorphic but with distinct vocalisation.

Siberian Chiffchaff –
photo by Jon Heath

 

Chiffchaffs seen in
the Dead Sea hotel gardens


“Why no tweety birds in my garden anymore, just Magpies and the occasional Crow?” said Kate of Sturton Street, as her bruiser of a cat surveyed the garden from her shed roof and another thuggish mog erupted through the cat-flap!

On 10th December, a Merlin was seen over the A14 at Girton (Guy Belcher; www.cbcwhatsabout.com). This fierce falcon is seen most winters in this area. I once saw a female Merlin near the Huntingdon Rd/Histon Rd footpath sitting on a lump of mud, as a Skylark flew over the falcon launched itself turned upside down and snatched the Skylark in mid-air and returned to the same lump of soil with its prey. Two hundred+ Linnets and a mixed flock of 25 Yellowhammers and 15+ Reed Buntings were feeding on sugar beet stubble north of the Huntingdon Road/Histon Road footpath, nearby was a covey of five Grey Partridges on 5thDecember and seven on  14th December and 56 Stock Doves on the latter date. I was shocked to see preliminary building excavations on this land under a planning consent by South Cambs District Council. I thought this land, north of the footpath and immediately south of the A14, was Green Belt. This area is breeding habitat to eight species of Red-Listed farmland birds and a colony of Common Lizards.

On 18th December, a single Pink-footed Goose was amongst the Greylags at MCP (CBC e-Bulletin No. 66 Dec 2018). 

Blackcapshave been appearing: a male and female in a garden off Huntingdon Road and the male in the birdbath on Christmas day. A male also appeared early morning in my Chesterton garden on 6thJanuary soon after a Red Fox made a run round the garden heading, I think, for sanctuary in the churchyard before the dog walkers appeared.

One to two Bramblings have been seen in a garden in Windsor Road (Chris Akhurst) and up to 40+ birds are still present in the Beechwoods (Paul Rule –www.cbcwhatsabout.blogspot.com).

I am still/always astonished I can watch Peregrines in the City while having a coffee sitting at Don Pasquale’s in the Market Square. They are now birds of the lowlands as well as specialities of the Highlands; from rarities to new colonists of stunning presence.

Hobson’s Park on 6thJanuary: male and female Stonechats and about 24 Snipe feeding around the lake margins; Teal on the ponds next to Long Road bridge. This time of year, tits start singing. On sunny days, Great Tits ring out with the sunshine; on overcast days, Blue Tits scratch out their repetitive stanzas. Is it me or is it the birds? – Blue Tit song is nothing like the repeated exuberance of Great Tits but a perfunctory effort that’s repeated once or twice and that’s it!

The latest Cambridgeshire Bird Club’s Annual Report for 2017 is now published – if you would like to purchase a copy please contact me and I will arrange delivery, for a fee (not sure how much it is to non-Bird Club members but will let you know). It gets bigger every year with stunning photographs and is full of interest. Two facts from a speed read about our NatHistCam area: Carrion Crow max. count on Parker’s Piece was 86 birds (I had originally put the City population at about 66!); a Black-headed Gull ringed as a first-year in Zuiderhogeweg, Drachten, The Netherlands on 5th January 2004 had its ring read on Parker’s Piece on 6th March 2017 – a distance of 415 Km and aged 13y 2m 1d!

The Annual Report also contains an excellent paper from staff at the RSPB’s Hope Farm at Knapwell on how to manage a profitable conventional arable farm, increase bird abundance and diversify habitats. Winter bird seed mixes are sown and mixed seed food is spread in areas where finches and buntings regularly feed to cover the “hunger gap” from January to April.

Male Teal near Hobson’s Park
Male Stonechat Hobson’s Park

Bob Jarman 10th January 2019

bobjarman99@btinternet.com


December 2018 – more astonishing night-time flyovers

Simon Gillings has more astonishing night time recordings of fly-over bird calls from over his Chesterton garden including a Bittern just after midnight on 16th November. I have heard the birds’ peculiar and distinctive “grunty” bark flight call at Lakenheath RSPB reserve on a summer daytime feeding flight. On the night of the 17th November he recorded at least 33 Dunlins flying over and on the 18th, his busiest thrush night so far: over 800 Redwings, 79 Blackbirds, 5 more Dunlins and a Water Rail. @simon_gillings Astonishing! Simon’s and Jon Heath’s “nocmig” recordings have added a new dimension to birding.

Are these birds moving on a broad front over the county and Simon catches just a part of this, are the birds attracted to the City lights or are these birds following a flyway/highway on a NE/SW trajectory following the river Cam valley?

On 11th November a Yellow-legged Gull and a late House Martin at Hobson’s Park (Rob Pople) and on 15th November a single Bearded Tit around the lake at Trumpington Meadows (Iain Webb): www.cbcwhatsabout.blogspot.com.

Ten to 15+ Bramblings were in the Beechwoods throughout most of November (Mike Foley, John Raven). I saw only 3-4 on 19th near the entrance but found them difficult to see and managed a poor photograph. On the 19th November, a dead and partially eaten (by Magpies) Woodcock was found in Jesus college grounds (Rhona Watson) and Rhona told me of a male Blackcap in the City and one in Huntingdon Rd on 3rd December. These are the first Blackcap records, this winter; I suspect the weather has not been cold enough to force birds into urban gardens and seek food security from garden feeders.

Brambling – Beechwoods

While having a cup of (Mario’s) excellent coffee at Don’s (Don Pasquale’s) on the Market Square, a Peregrine was seen on roof tops, on 23rd November. I estimate the chances of seeing a Peregrine near/around/over the Market Square about 30%;    astonishing considering the only reliable location to see Peregrines, when I started birdwatching, was a quarry behind Aviemore in the Highlands.

The building of the new cycle way over the river next to the Chesterton railway bridge has, sadly, forced the removal of a mixed species hedge which had breeding Common Whitethroats and Lesser Whitethroats this year. The majority of UK breeding Lesser Whitethroats nest in hedge-rows.

St Regis, the apartment complex in Chesterton Road which has the biggest breeding Swift colony in the City, is being demolished. Hopefully returning birds next May will move to the Swift Tower on Logan’s Meadow.

Three hundred Golden Plovers flew over the north edge of our project area on 24th November and 4-500 were over the A14/M11 junction on the same day with about 50 Lapwings.

Cormorant, RiversideLapwings, Riverside (left)                                               Cormorant roost (right)

A Green Sandpiper was feeding on the edge of a farm reservoir on the northern edge of our project area on 25th November. Goldcrests rarely make the 75m journey from a neighbouring mature Lellandii to my small Chesterton garden but they did during the coldest day so far this winter on 26th November. On 30th November, a Mistle Thrush was singing outside Murray Edwards College on Huntingdon Road and on 1st December a Common Buzzard over Benson St/Priory Road was mobbed by corvids at roof-top height.

Peregrine from Don Pasquale’s Jesus Lock (left)  Black-headed Gulls – 1st yr. bird 2nd from bottom (right)

Black-headed Gulls are assembling from Jesus Lock to Riverside and Parker’s Piece; the maximum count so far is 98 (270 last year) – of these about 10% are 1st winter birds – i.e. reared from eggs this calendar year. Their main food is earthworms on our riverside greens and water meadows; amongst them have been about a dozen Common Gulls.

On 4th December, a Tawny Owl was heard briefly in Magdalene Street behind St Clement’s Church; the Riverside Cormorants roost was 6 birds; just opposite the Darwin Green development, on sugar beet stubble, a flock of about 200 Linnets and on 5th a Barn Owl over Coldham’s Common c19:15 (Simon Gillings). cbcwhatsabout.blogspot.com

Duncan McKay says that six Badger sets are located within a mile radius of the City centre. Polecats have been moving east following the corridors of our major roads; there is a well-established group at Camborne and apparently a pair reared kits in Chesterton 2-3 years ago!

Bob Jarman
10th December 2018 bobjarman99@btinternet.com

November 2018 – bird migration north and south in autumn

At the recent Cambridgeshire Bird Club conference on Migration, Simon Gillings described his astonishing night time recordings of birds passing over his Chesterton garden: Little Grebes, including display calls, Barn Owl, Ring Ouzel, Common Scoter, Sandwich Terns – adult and juvenile and on several nights big numbers of thrushes. Overnight on Sunday 4th – Monday 5th November he recorded his “busiest” thrush night ever with at least 850 Redwings, a minimum of 79 Blackbirds, plus five Dunlins and a Water Rail and Fieldfares. @simon_gillings. Astonishing!

As well as providing new insights his records also complement some daytime observations. I have very rarely seen Little Grebes fly – only scurry across open water in a panic – but they have colonised the new lakes at Trumpington Meadows, Hobson’s Park and Eddington so they must arrive on night time migrations. I have seen an adult Sandwich Tern being trailed by a begging juvenile over Vinery Road many years ago. On 31st October Simon recorded a big night time passage of Redwings, Blackbirds, Song Thrushes and Fieldfares; the following morning I saw many Redwings feeding on hawthorn berries along the river to Baitsbite Lock.

It’s not just night time recording that adds to our understanding of bird movements. At the same conference, Dick Newell described a Common Swift, satellite tagged in one of his nest boxes in Landbeach, which was tracked to Mozambique the following winter. This bird almost certainly fed over Cambridge and our project area.

Three wintering Blackcaps caught in the UK and with fitted with geo-locators were found to have come from: 1, Eastern France; 2, Central Germany/N Italy; 3, Western France. Bird No3 must have migrated due north to winter in the UK.

So, where do birds live? Do they live where they breed, where they spend their winter or in the migration locations in between? Bird distribution is governed by food supply. The current thinking is that many species originated in (sub-Saharan?) Africa and moved out to follow seasonal sources of food when their African food supply became limiting; 2.1 billion birds migrate between Europe and Africa.

A species of Willow Warbler weighing less than 10gms (the weight of a 50p piece) has been tracked migrating from far Eastern Siberia, where it breeds, to over-winter in Tanzania/Mozambique. This one-way migration of 12-13,000km is the longest recorded amongst songbirds; the following spring it returns over the same distance. This truly is survival of the fittest!

Yellow-legged Gull Hobson’s Park (left)

The pair of Yellow-legged Gulls, one with a red leg ring (below)

 

Most winters there an influx of an unusual species. Last winter it was Hawfinches, this winter early signs suggested Couses’s (Arctic) Redpolls, Waxwings and/or Rough-legged Buzzards. The few Redpolls that have been found are mainly coastal but a carefully look amongst Lesser Redpoll flocks – in the Alder trees by the guided Busway near the Regional College – is worthwhile, Waxwings in Helsinki is a good early sign they will appear in the UK, but few have turned up. A good spot for Rough-legged Buzzard (R-LB) could be on the rough fallow north of Eddington. There are two R-LBs in the north of the County at the Great Fen project. If Short-eared Owls and a Hen Harrier can occur on the fallow before the construction of nearby Darwin Green, then so could a R-LB turn up here.

A new species for me in our project area was two Yellow-legged Gulls (Larus michahellis) at Hobson’s park on 6th November. Rob Pople saw them there on 20th October and the same species was there on 26th November 2017, plus one on Emmanuel College Sports pitches (off Wilberforce Road) in July 2015. Other recent records: Coldham’s Common, June 2016 (Carlos Davies); over Cambridge Science Park in July 2018 (Jon Heath); and Hobson’s Park on Sept 19th this year. This species was first recorded in Cambridgeshire in 1987 when it was then considered a sub-species of Herring Gull (Larus argentatus michahellis). One of the recent birds has a red leg ring. The birds were adults, at least 4 years old; the leg ring should have a visible identification number but it was probably put on as a newly fledged chick and the number has faded. It was probably ringed in southern Europe, where they breed and where it is the common summer sea-side gull replacing the Herring Gull. Wintering north of their breeding range is unusual but now regular!

Kestrel at Eddington

Black-headed Gull and Great-crested Grebe Eddington (below right)

Hobson’s Park Reserve (below left)

 

 

 

 

 

At Hobson’s Park a relationship between Great-crested Grebes and Black-headed Gulls can be seen: the gulls pick off edible material disturbed by the diving grebes; the same can be seen at Milton Country Park between Coots and Gadwall ducks.

A Common Buzzard over the Market Square on 27th October sent the pigeons scattering; 2 Grey Wagtails over Eddington and two Kestrels were hunting over fallow land to the north of the development on 5th November; a pair of Tree Creepers in Logan’s Meadow on 6th November; a flyover Green Sandpiper was heard near Fen Ditton on 8th November. Hobson’s Park attracts other species: on 9th November 9-11 Snipe around the lake margins is the biggest number of this species I have seen in our project area since they bred, with Redshank, in the wet meadows along the Fen Road up to the mid 1980’s; plus, a Stonechat and a Kingfisher. On 12th November 15+ Bramblings were recorded in the Beechwoods (Mike Foley) and a Bearded Tit at Trumpington Meadows on 15th November (Iain Webb) www.cbcwhatsabout.blogspot.com

Bob Jarman

bobjarman99@btinternet.com

17th November 2018

October: best month for birding – watch out for Warblers and Raptors

Six hundred and thirty Golden Plovers over Trumpington on 2nd October was a good record (Steve Cooper, www.cbcwhatsabout.blogspot.com); Hobson’s Park is a good place to see overwintering birds. A Chiffchaff was singing in Long Road on 7th October and another bird calling in Logan’s Meadow on the same day. It’s worth keeping ears and eyes alert for rare migrant warblers especially Yellow-browed Warblers that are being found increasingly inland and not just along the east coast in autumn. A probable was heard by Nick Littlewood on 19th October in trees off the Fen Causeway but was not seen or relocated – they like Sycamores. In previous years, they have been seen and heard near Maids Causeway, Castle Hill (photographed) and last year in the trees bordering Stourbridge Common.

Trumpington Meadows on the 9th October had three hunting Kestrels; five Little Grebes on the pond and a confusing first year female Tufted Duck without any sign of a tuft. Trumpington Meadows and Hobson’s Park have been buzzed by drones which certainly disturb wildlife. If you see drones there contact the Wildlife Trust and Cambridge City Council (Guy Belcher) respectively. Disturbance especially during the breeding season could be an offence under the Wildlife and Countryside Act (1981).

My Robin has stopped attacking its reflection in my windows but Richard Price, whose house overlooks Hobson’s Park, sent me a picture of a stunned Meadow Pipit that had flown into his window; the bird recovered and flew off.

 

     

Stunned Meadow Pipit – Hobson’s Park (left)  Male Peregrine – Cambridge (right)

The night time recording of flyover migration by Simon Gillings (@simon_gillings) continues to produce fascinating records: overnight on 1st – 2nd October Pink-footed Geese; 7th-8th October, Common Scoter, Snipe, Redwing; 10th – 11th October, 352 Redwings and 101 Song Thrushes – the last date also saw big numbers of thrushes arrive along the east coast at Holme Bird Observatory. Goldcrests have either arrived from the continent or have disbursed from local coniferous nest sites: two were in the only trees in Thompsons Lane on 13th October – potted Olive Trees – by Jesus Ditch and Beche Road

The more we know about bird migration the more remarkable it becomes – not less! The recording of night time migration at inland locations and the identification of species killed by Peregrines at their inland nest sites has added new dimensions to our understanding as well as satellite tagging and geo-locators, which require catching the birds and attaching these devices to them. The Cambridgeshire Bird Club has a conference on Bird Migration on Saturday 2nd November at Cottenham Village College – all are welcome – details on the Bird Club’s web site.

At Wakefield Cathedral, beneath the Peregrine nest and roost site, the severed head of a Leach’s Petrel has been found! This pelagic species was either an inland vagrant brought in on strong winds (there is some evidence for this) or a strategic overland migration from the North Sea to the Irish Sea and then onwards to the south Atlantic where this species spends our winter. In spring, it returns to breed on the northern isles such as Foula. This bird never made it and was probably killed by a Peregrine at night.

The Cambridge Peregrines can still be seen regularly in the city centre and have been seen along Madingley Road (Robin Cox) and over the junction of Histon Road with Gilbert Road. The photograph shows the male, taken on 18th October – the female is about a third larger with bigger moustaches!

Crowing over the flag!

Pre-roost gathering of Carrion Crows

Kestrel over Trumpington Meadows

Black-headed Gulls began to arrive along the river, in small numbers, from Riverside to Jesus Green in the second week of October; last winter numbers built up to about 275 birds. Grey Wagtails, typically birds of waterside can be seen and heard over any part of the City but two were around Jesus lock on 13th October. A Red Kite was seen over farmland in the north of our project area on 19th October. On the same date a pre-roost gathering of 35+ Carrion Crows assembled in Whytford Close, Chesterton, making an absolute din – a cacophony of crows! This number is probably half the City’s population. I have no idea why or whence they departed. I couldn’t resist photographing one Carrion Crow standing on the top of the flagpole above the Guildhall.

The photograph of the Roe Deer was taken on 15 October at the Stump, just east of the Fen Ditton/Horningsea Road on the edge of our project area; a good place to see Roe Deer in our project area.

Roe Deer at the Stump Spider season (left)  Garden Orb spider (right)

Bob Jarman bobjarman99@btinternet.com 25th October 2018