29 Oct 26

Priorslee Balancing Lake and The Flash

9.0°C > 11.0°C: Initially overcast apart from clear-skies to the far south-east. By 06:30 mist began to roll in from the north-east. Lifted to low cloud only after 09:00. Initially calm; a light southerly breeze developing. Mostly poor visibility.

Sunrise: 07:01 GMT

* = a species photographed today
! = a first sighting of the species this year
$ = a new species for me in this area

Priorslee Balancing Lake: 05:45 – 08:50

(240th visit of the year)

Bird notes:
- the male Pheasant was strutting about the south-west grass: noisily too.
- no Mute Swans seen.
- only two Great Crested Grebes found and both these were adults. No begging calls heard. With the mist it is impossible to be certain these were the only birds present.
- at least 450 Black-headed Gulls were on the water by 06:45. More than 50 were noted leaving at the West. As I was approaching the football field at 07:05 about 150 were estimated to be flying off. With them were four large gulls, one of these identified as an adult Lesser Black-back. There were still 72 on the grass along with another adult Lesser Black-back. I checked the field again at 08:45: just 13.
- the large gulls were early arrivals today. By 06:35 there were at least 400 on the water (pic) with some still arriving and some already leaving. No Herring Gulls were noted at this time.
- later gull arrivals were eight Herring and 28 Lesser Black-backs. None was noted flying over!
- Redwing(s) calls were heard at three separate locations. Nothing seen overhead. Probably birds calling from trees?
- a Reed Bunting was calling along the South side.

Bird(s) noted flying over here:
very little was seen flying over: badly affected by the mist and low cloud
- 3 Wood Pigeons
- 152 Jackdaws
- 68 Rooks
- 3 Pied Wagtails

Counts from the lake area:
- 2 Canada Geese: visited briefly
- 7 (4♂) Mallard again
- 43 (23♂) Tufted Duck
- 5 Moorhens
- 19 Coots only: partial count?
- 2 Great Crested Grebes: see notes
- c.450 Black-headed Gulls
- 8 Herring Gulls
- c.425 *Lesser Black-backed Gulls
- 3 Cormorants
- 1 Grey Heron

Birds seen leaving roosts around the lake:
None

Later on the Teece Drive fence:
Nothing found

Elsewhere:

Fungus:
- *Shaggy Inkcap or Lawyer's Wig Coprinus comatus
- *Weeping Widow Lacrymaria lacrymabunda

On the West end street lamp poles before dawn:

Moths:
- 5 November Moth type Epirrita sp.

Four-winged flies
- 1 *Common Green Lacewing Chrysoperia carnea
- 1 *barkfly Ectopsocus briggsi agg.

True flies:
- 1 small midges
- 2 *winter cranefly Trichocera sp.

Beetles:
- 3 Cabbage-stem Flea Beetle Psylliodes chrysocephala

Planthoppers:
- 1 *planthopper Eupteryx urticae

Spiders, harvestmen etc.:
- 1 Bridge Orb-web Spider Larinioides sclopetarius [Bridge Orbweaver]

Have you a spare moment? Would you like to count the gulls on the water in this photo taken at 06:35? I thought not. I reckon about 400 and as far as I can tell all Lesser Black-backed Gulls.

A Common Green Lacewing Chrysoperia carnea covered in dew. None that I have seen recently have shown any sign of changing to the brown over-wintering colour.

This tiny insect is a barkfly Ectopsocus briggsi or similar. The wing markings (faint in my photo) do not help with specific identification. Out with the microscope!

It is not always easy to persuade the camera to focus on the winter cranefly Trichocera sp. and not its shadow. Not that it makes much difference as there is little in the way of markings to reveal.

Seems a strange time of year for these planthoppers Eupteryx urticae to be active. My third in as many days.

Two new fruiting bodies Shaggy Inkcap or Lawyer's Wig Coprinus comatus with two of the existing Weeping Widow fruiting bodies Lacrymaria lacrymabunda.

(Ed Wilson)

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In the Priorslee Avenue tunnel:

A very poor showing but at least there was a moth!

Moths:
- 1 *Rusty-dot Pearl Udea ferrugalis

True flies:
none!

Spiders, harvestmen etc.:
- 1! Missing Sector Orb-web Spider Zygiella x-notata [Silver-sided Sector Spider]

My seventh Rusty-dot Pearl moth Udea ferrugalis in the tunnel this year. I did not record any in 2024 or 2025.

(Ed Wilson)

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The Flash: 08:55 – 10:00

(238th visit of the year)

Visibility under the low cloud was acceptable but not great.

Bird notes:
very quiet with most species in lower than usual numbers.
- a single adult Mute Swan again.
- yesterday's trio of (Common) Teal not found.
- Coot numbers seem to be dwindling further. Last Winter gave very low counts. So far this Winter period is worse. I know that there is an outbreak of avian botulism affecting many waterbirds. I have seen none here exhibiting the classic symptoms of sick birds – being unable to hold their neck up.
- I only confirmed three of the erstwhile four juvenile Great Crested Grebe.
- a single Grey Heron only.

Bird(s) noted flying over here:
None

Noted on / around the water:
- 4 Canada Geese
- 1 Mute Swan
- 28 (20♂) Mallard
- no (Common) Teal
- 25 (15?♂) *Tufted Duck
- 7 Moorhens again
- 13 Coot only
- 2 + 3 (1 brood) Great Crested Grebe: see notes
- 22 *Black-headed Gulls
- 1 *Herring Gull: third-winter
- 3 *Cormorants
- 1 Grey Heron

Noted around the area:

Dull and mild. Only wasps at the Ivy despite a prolonged search. Not even a fly!

Bees, wasps etc.:
- >30 wasp Vespula sp.

Spiders, harvestmen etc.:
- 1 harvestman Opilio canestrinii: as yesterday

Of note:
Nothing else

Drake Mallard always outnumber ducks here but 8:1 seems excessive (even if one of them is the "what sex is it really?" bird (dead-centre)).

Size comparison: a third-winter Herring Gull with an adult-winter Black-headed Gull in the foreground (and an immature / still-moulting drake Tufted Duck behind). The Herring Gull can be aged by the extent of the black on the bill and the faint brown tones to some of the feathers in the folded wing.

Two Cormorants and a Magpie have bagged the good vantage points on the island. At the bottom of the photo is the Cormorant that missed out.

This Cormorant, still just immature with a few white feathers in the belly. Not a bad photo considering the lighting conditions at the time.

(Ed Wilson)

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2013
Priorslee Lake
7 Gadwall
1 Teal
1 Raven
(John Isherwood)

The Flash
Location
1 Pochard
1 Teal
(John Isherwood)

2012
Priorslee Lake
1 Yellow legged Gull
2 Gadwall
1 Shoveler
1 Wigeon
Chiffchaff
10+ Fieldfare
Siskin
Willow Tit
(John Isherwood)

The Flash
Location
3 Pochard
Sparrowhawk
(John Isherwood)

2010
Priorslee Lake
34 Pochard a high count
500+ Lesser Black-backed Gulls
432 Jackdaws
228 Rooks
171 Fieldfare
5 Redwings
2 Siskins
4 Linnets
(Ed Wilson)

2006
Priorslee Lake
115 Canada Geese
9 Pochard
52 Tufted Ducks
1 Kestrel
c.200 Golden Plover
23 Pied Wagtails
17 Robins
18 Blackbirds
12 Song Thrushes
70 Redwing
1 Mistle Thrush
9 Fieldfare
1 Chiffchaff
1 Blackcap
1 Willow Tit
195 Jackdaws
206 Rooks
31 Greenfinches
4 Redpoll
10 Reed Buntings
(Martin Adlam)

2005
Priorslee Lake
Buzzard feeding on earthworms, mobbed by Black-headed Gulls
1 Raven
7 Pied Wagtails
3 Grey Wagtail
11 Meadow Pipits
Kingfisher
1700+ Wood Pigeon
192 Redwing
111 Fieldfare
(Martin Adlam)