A fine, dry week saw the pace of migration slow somewhat, although winds in the latter half were a keen north-easterly, turning to a strengthening easterly at the very end of the period. With all the summer visitors now in, speculation is running high on what might be found over the forthcoming two weeks.
Apart from a few thinly scattered Wigeon, the last vestiges of winter wildfowl remained in the shape of the first-summer Whooper Swan, still present at Thrapston GP until at least 12th, while the escaped female Bufflehead was seen again at Clifford Hill GP on 14th.
With singles at Thrapston on 12th-13th and one at Stanford Res on 16th, this week’s two Great Egrets doubled last week’s total but they generated little interest when compared with the reappearance of the Cattle Egret, back at the far north end of Stanwick GP from 12th until at least 14th. Assuming this is the same individual, which was last seen there on 23rd April, where has it been during the intervening period?
Away from the Nene Valley, roaming Ospreys continued to be reported, including singles at Stanford Res on 12th and at Hollowell Res on 13th and 16th-17th. Otherwise, it was a week of little action on the raptor front.


This was not the case with waders, however. With most of the occurrences in the Nene Valley, Summer Leys LNR produced two fabulously flamboyant male Ruffs from 14th until 16th with, following last week’s run, another Grey Plover there on the latter date. The week’s only Whimbrel was reported from Ravensthorpe Res on 11th while, back in the valley, two Bar-tailed Godwits were found at Clifford Hill GP on 14th, being joined there by a third the following day.

Hollowell Res subsequently produced only the third Sanderling of the year so far, with one on Guilsborough Bay Point on 17th. Back at Summer Leys, following two Wood Sandpipers on the scrape last week, another turned up on 15th and two were present the next day, these figures being mirrored there by Greenshanks on the same dates. Five Greenshanks were at Ravensthorpe Res on 15th, followed by three more at nearby Hollowell two days later, on 17th.
After last week’s ‘big passage’, events this week were less dramatic when it came to Black Terns moving through the county. The 11th saw singles at Thrapston GP and Stanford Res, followed by three at the latter locality on 12th, two at Pitsford Res on 16th, with two also at Summer Leys/Earls Barton GP on the same date and two at Stanwick the next day.

In terms of numbers, passerines were poorly represented over the past seven days. The Clifford Hill Northern Wheatears – looking very much like the ‘Greenlanders’ they surely are – had increased to at least five on 11th but had fallen back to two by 14th, while another two were found at Park Farm, Wellingborough on 11th.

A female presumed Blue-headed Wagtail appeared on the scrape at Summer Leys on 17th, although nothing about its appearance ruled out Grey-headed Wagtail but then, with flava wagtails, there is always that nagging complication of intergrades … Two Crossbills were mobile around Hanging Houghton on the last day of the period, apart from which, things were quiet.
In a week when local temperatures remained depressed, Britain recorded one of its coldest May Day bank holidays on record and predominantly northerly winds and rain did their best to halt migration. Undeterred by the weather, migrants continued to push through, evidenced in the main by large numbers of hirundines and Common Swifts battling against the elements, alongside a notable second wave of Black Terns and a continuing northward movement of waders.
Summer visitors recorded arriving for the first time during the past week include:
Still in no apparent hurry to depart, the first-summer Whooper Swan remained at Thrapston GP until at least 8th, feeding with the resident Mute Swans in surrounding crop fields. Numbers of other wildfowl were, unsurprisingly, limited for early May but the monopoly maintained by Summer Leys LNR on Garganey was at long last broken when a drake appeared at Pitsford Res on 8th-9th, while the Summer Leys drake was still present, though elusive, on 10th. Stopping off on the latter date, two female Common Scoters were well north of the dam at Pitsford Res, while the escaped female Bufflehead, described as ‘legendary’ by BirdGuides, was back at Clifford Hill GP on the last day of the period. Since she was last seen there on 2nd, her roving nature has taken her up to South Yorkshire, where she spent at least two days at Old Moor, in the Dearne Valley, before returning to Clifford Hill!

















Last week’s prolonged easterly airstream unfortunately broke down and gave way to winds from a westerly quarter, ultimately turning northerly at the week’s end. As a result, and in stark contrast to the last review period, passage migrants took a tumble in numbers, the heady flow of godwits and Little Gulls dried up and there was only one ‘first-time’ summer visitor reported.



The generally easterly airstream continued to dominate, moving round to the south-east before eventually swinging south-west as ‘Storm Hannah’ approached at the week’s end. Local temperatures hit 24°C on 22nd, after which they fell away and showers ensued from 24th. Little Gulls and passage waders took centre stage, while summer visitors continued to arrive in small numbers.
Summer visitors recorded arriving for the first time during the past week include:
















The prolonged easterly airstream continued as the Scandinavian high pressure system filled and slipped further south, dragging warm air up from the continent as it did so. By the week’s end, local temperatures had hit 22°C and migrants continued to arrive in significant numbers throughout the period.












Late in the season but not unprecedented, a Short-eared Owl was out at the northern end of the Stanwick complex during the evening of 19th and the wintering Great Grey Shrike remained in the Brampton Valley below Hanging Houghton until at least 17th. The second Woodlark to be found in the county this year flew east over the dam at Pitsford Res on 15th. Surprisingly, for a species which breeds only tens of kilometres from Northamptonshire and is also a migrant, there have been only three previous records this century (2001, 2014 and 2016) as well the aforementioned individual in January this year, if accepted.

Following last week’s swing to a south-easterly airstream, the period began with more of the same, the wind quickly turning east to north-east as a high pressure system became anchored over Scandinavia for much of the week. Low cloud, mist and occasional drizzle ensued – such conditions being the stuff of dreams on the east coast in autumn. This was, however, Northamptonshire in early April but the birds did not disappoint, with Little Gulls once again rising to prominence alongside early Black Terns and the arrival of more summer visitors.

































The storm before the calm saw a continuation of last week’s gale force westerlies for the first two days of the period, before high pressure built over the country to deliver conditions more conducive to migration. On that theme, the first Osprey was seen cruising north and Northern Wheatears made landfall at three localities.





A succession of low-pressure systems, scudding rapidly across the North Atlantic, brought intermittent gales and rain on predominantly north-westerly winds. A fallout from this was the year’s first Kittiwake – one of a series of inland records during the period.
