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August to October was a real mixture weather-wise, though warmer temperatures prevailed throughout. August and most of September produced some fine late summer weather, while October was dominated by wet and windy conditions from the west, far less the norm in recent years.
As is becoming the norm, Fleet Pond was again polluted by blue-green algae bloom, but the birds seemed to have coped well.
Before plunging into the highlights of this autumn’s migration, there was again late — even later than last year — welcome news on the breeding front. A pair of Great Crested Grebes successfully hatched two young, first seen on the incredibly late date of 5th September. I am glad to report that at the time of writing, both youngsters are thriving and still being fed by their parents as we reach the end of October!
This is the fourth consecutive year that Great Crested Grebe (illustrated above) have bred at the reserve, after an absence of a decade as a breeding species. This year’s two young matches last year’s success.
Six pairs of Great Crested Grebe were in residence over the summer, but only this one pair successfully nested. A notable fact is that the date when the young have been first seen is getting later each year! This family coexisted with the growing number of migrant Great Crested Grebes present at the Pond as the autumn progressed, with peak counts of 11 in August, 21 in September and 24 in October.
August is one of the best times to connect with summer warblers and other scarcer passerines at Fleet Pond; local breeds combine with passing migrants to form large, roaming mixed flocks. The most favoured location to connect with these flocks is on the northeast side of the reserve, anywhere between the Dry Heath, the MoD field, the East Marsh and Sandy Bay.
Whitethroats (illustrated below) were particularly in evidence this year suggesting they had a successful breeding season. A tally of 23 were logged on 12th August, along with eight Stonechats and 15 Reed Buntings.
In contrast, Blackcap and Chiffchaff numbers seemed below normal. Scarcer migrants included two Tree Pipits on 21st August, and a Spotted Flycatcher and two Wheatear on 27th August at the MoD field (illustrated below).
Two Yellow Wagtails roosted on the central islands on 21st August and a flock of four of the same flew over west on 23rd August. Sand Martin continued to put in a good showing in August, peaking at 150 between 10th to 14th August. In contrast, Swallow numbers were disappointing.
Good numbers of House Martins passed through southwest in the latter two weeks of September, including counts of 815 and 630 southwest on 22nd and 24th September respectively, and the last Swift of summer was seen on 4th September. Other visible migration reports included 97 Meadow Pipits over southwest on 18th September. A Raven was spotted soaring to the north on 8th August and a late Hobby passed through southwest on 26th September.
A scattering of wader sightings included a migrant Green Sandpiper on 2nd August, with one of two in residence regularly from 20th August until 24th September. Other waders included a Redshank on 10th August, a Common Sandpiper on 5th September and the first Snipe of the autumn on 18th September.
Three species of terns were recorded in this period, including an adult Arctic Tern with two Common Terns on 23rd August and two juvenile Black Terns which checked-in for a five day stay between 1st-5th September, and another juvenile believed to be different was present on 6th September.
Despite the late summer blue-green algae bloom, wildfowl put a better showing this autumn with the second recording of Garganey for the year. This time it was an eclipse male found on 1st August which stayed until at least 20th August. Unfortunately, throughout his stay he was particularly elusive and didn’t really offer close viewing opportunities.
It was a better autumn for Shoveler with two spotted on 3rd August, three on 5th and then a group of five on 27th August. Numbers steadily built up thereafter to a peak of 43 on 24th September and 38 on 23rd October. Shovelers seem to be regularly commuting between Fleet Pond, Tundry Pond and Dogmersfield Lake; hopefully they will stay into the winter. (illustrated below)
Roosting geese peaked at the end of August with a high count of 201 Canada Geese and 174 Greylag Geese on 25th August. One or two Mandarin Ducks were reported on a few dates in August and September. Gadwall (illustrated below) were present throughout the period with a peak count of six on 18th September.
This summer’s Starling roost, first reported in early June, continued into the autumn, with peak counts of 1,550 present on the evening of 21st August and 1,200 on 5th September. Now onto late autumn and winter…..
Contributing Observers: Evelyn Auld, John Clark and Graham Stephenson.
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William Legge writes:
The period early April to the end of July was rather varied weather-wise, with temperatures slightly above average in April and May but with below average rainfall. The first three weeks of June were colder and wetter than usual, before a warmer weather pattern took hold culminating in several hot spells and peaking on 25th July when temperatures exceeded 32°C/90°F.
With exception, it seems to have been a largely productive breeding season.
Spring is arguably the best time for birds at Fleet Pond. The season rarely disappoints in terms of variety, as late winter migrants rub shoulders with newly arrived summer visitors. Then the air is full of song and the birds are looking their best in breeding plumage.
The late winter migrants included the remnants of March’s Brambling flock. These were sighted in the Brookly Stream corner up until 17th April, when ten were still present, including several males in their smart breeding plumage; whilst the last Redwing of the season was noted heading over northeast on 23rd April.
Expected spring migrants appeared in greater numbers as April progressed. It was a particularly good spring for Sand Martins, with peak passage on 8th April when 321 were noted heading over north in 60 minutes of counting. Singing Chiffchaffs and Blackcaps were widespread around the reserve by 10th April when the sole spring record of Willow Warbler was recorded. The first Reed Warbler was heard on 17th April, Garden Warbler and Whitethroat on 29th April and the first Swift seen on 30th April.
Scarcer spring passage migrants included single Little Gulls on 6th, 8th and 9th April, 20 Arctic Terns (ten briefly on 19th April and a further ten on 8th May – all leaving northeast) and seven Black Terns (one on 25th April, three on 8th May, one on 9th May, and two on 17th May). The first Common Tern of the spring was seen on 19th April and they were regular visitors thereafter, with a high count of 12 passing through on 17th May 2019. Migrant waders again disappointed with a Redshank on 9th April, Common Sandpiper (two on 23rd, one 30th April and two 15th May), single Oystercatchers on 29th April, 24th and 25th May and 2nd June, a circling Dunlin on 8th May and a scattering of Snipe (last on 3rd May) and Little Ringed Plovers.
A female Garganey, one of the highlights of the spring, was present between 7th-10th May, favouring the pool adjacent to Grasmere reedbed. This is the second spring in a row that this scarce visitor has been recorded at the reserve, and hopefully it is the start of a new trend. It definitely headlined the migrant wildfowl.
A handful of Shoveler was recorded in April including a pair that were in residence for most of the month. Unexpected were a Shelduck on 23rd April and a Barnacle Goose on 29th April, the latter no doubt of feral origin. Other spring migrants included two Woodlark in the MoD fields to east of the reserve on 29th April, an Osprey (illustrated above) that drifted through north on southerly winds on the evening of 7th May, a Little Grebe on 11th May, a Peregrine Falcon over on 25th May and a report of a possible Iberian Chiffchaff briefly singing at the eastern edge of the reserve adjoining the MoD fields on 29th April.
Summer Breeding Season
Excitingly three protected ‘Schedue 1’ species took up territory or attempted to breed at Fleet Pond this year for the first time. While two were unsuccessful, their presence is hopefully a sign of things to come in future years. First-up, a pair of Mediterranean Gulls
(illustrated above) settled into the Black-headed Gull colony on Clearwater Island in mid-April and were individually seen dropping into the same spot each day until the second week of May. It is suspected that this pair had built a nest and were likely incubating eggs but for whatever reason the eggs never hatched – perhaps due to inclement weather on 8th May, the inexperience of this pair (one of which seemed to be young – a 3rd calendar year bird) or perhaps through predation. By coincidence, this year’s colony of Black-headed Gull had a poor year too, with an estimated 160 pairs nesting (40% down on 2018) and only producing an estimated 50+ young. Secondly, a male Cetti’s Warbler took up territory in the reedbeds and scrub between the Chestnut Grove jetty and the Brookly Stream. First heard at this location on 23rd April, it remained faithful to this area until at least 9th June. Only occasionally seen, it is not thought to have attracted a mate. Single Cetti’s Warblers have been present at the Reserve over the last few winters, but this is the first time one has taken territory in the breeding season.
Finally, one or two Firecrest (illustrated above) took up territory in the Brookly Wood for the first time. Attracted by the Bookly Wood’s habitat – mature woodland with plenty of ivy and under-storey holly – it is likely that breeding took place. At least one individual was still present on 12th July.
Other notably breeding news included the presence of a pair Cuckoos (a single bird pictured above at the Pond) up until the second week of June, with the male loudly announcing his arrival on 1st May. This is the first time for several decades that Cuckoos have been present throughout the breeding season at Fleet Pond. Usually we have been lucky to have just have one or two sighting each spring over the last decade.
Up to ten pairs of Tufted Duck bred successfully and are on course to raise a record 20 young and two pairs of Gadwall (with at least four young successfully raised). Six pairs of Great Crested Grebes are in-residence but none appear to have bred, and Water Rails were heard from three different locations around the Pond which is encouraging.
Minimum estimates of summer warbler territories this year include at least 15 Reed Warblers (pictured above at the Pond) ten Blackcaps, seven Chiffchaffs, four Garden Warblers and three Whitethroats, the latter territories on the reserve with several other pairs of Whitethroat on the adjoining MoD fields (pictured below).
Unusually, Sand Martin was the most numerous hirundine throughout the summer, with a peak of 60 on 8th June but up to 20-40 were present most days suggesting that breeding maybe taking place close-by. In contrast (Barn) Swallow, House Martin and Swift numbers were lower. The Jackdaw roost, that took hold in the late winter has been sustained into the summer months with 90 still roosting at the reserve on the evening of 3rd June while post-breeding Starlings have also started to roost again this year with a count of 700 noted on 3rd June. Early autumn migrants are now starting to appear with two Shoveler present on 21st July and the first returning Common Sandpipers (two) on 28th July. Next up – autumn migration proper!
Contributing Observers: David Buckler, John Clark, William Legge, Michael McCarthy and Graham Stephenson.
Photographs credit: William Legge
Illustrations credit: www.rspb.org.uk/birds-and-wildlife/wildlife-guides/bird-a-z/