4 Dec 21

Priorslee Lake and The Flash

4.0°C > 6.0°C: Overnight rain clearing away to far E. Mostly clear with a few puffy clouds later. Started with light W wind, increasing fresh. Very good visibility.

Sunrise: 08:02 GMT

* = a photo today

Priorslee Lake: 06:30 – 09:20

(279th visit of the year)

Bird notes:
- One Mute Swan again. Apparently finally got lonely and flew off E at 08:00.
- The usual five Gadwall (three drakes) at the E end. Later a pair at the W end: another? one of the others relocated?
- c.100 Golden Plover were seen in typical formation flying N to E at 07:40. Then while I was checking over-flying gulls at 09:05 I noted 34 Goldies flying high W overhead – not visible to the naked eye.
- Very different behaviour by the gulls this morning. At 07:00 there were just c.20 Lesser Black-backed Gulls on the water. Only c.100 Black-headed Gulls flew in. Very many more large gulls both arrived (>135) and flew in a steady stream of birds SW (>435). The vast majority of these were Lesser Black-backed Gulls and very, very few of these were not adults.
- A Cetti's Warbler sang in the extreme NE area at the same time as another was calling along the N side. So there are two birds.

Overhead:
- 1 Feral Pigeon
- 86 Wood Pigeons: 58 of these flew low E in two groups
- >130 Golden Plover: see notes
- 12 Black-headed Gulls
- 14 Herring Gulls
- >435 Lesser Black-backed Gulls: see notes
- 1 Common Buzzard
- 142 Jackdaws
- 3 Starlings: together
- 5 Redwing: two groups
- 3 Pied Wagtails only heard
- 1 Lesser Redpoll
- 6 Siskin

Birds noted leaving roosts around the lake:
- 1 Starling
- 5 Redwings

Warblers noted:
- 2 Cetti's Warblers: see notes

Counts from the lake area:
- 1 Mute Swan: flew off
- 5 (3♂) Gadwall: see notes
- no Mallard unusually
- 1 (1♂) Pochard
- 25 (11♂) Tufted Duck
- 8 Moorhens again
- 43 Coots
- c.100 Black-headed Gulls
- 13 Herring Gulls
- >155 Lesser Black-backed Gulls

At / around the street lamps pre-dawn after another wet night:

Moths:
- 1 Winter Moth (Operophtera brumata)
- 1 Mottled Umber (Erranis defoliaria)
Also two moths I am still mulling over

Spiders or Harvestman:
None

Later:
Nothing noted

The Mute Swan leaving.

This small moth with well-rounded wing-tips is clearly a Winter Moth (Operophtera brumata).

This rather unmarked moth is a Mottled Umber (Erranis defoliaria). The dark spot in the wing is just about the only marking visible. Because of the base colour I did think about a poorly marked Scarce Umber but the forewing of that species is not as straight-edged as shown here.

I am still pondering this moth. Slightly larger than the Winter Moth with a differently-shaped wing. There is a Northern Winter Moth (O. fagata) which is larger but it is also described as paler. Its status in this area is not clear.

And pondering this one also. Even larger. My best guess is that it is a rather late November Moth agg. (Epirrita sp.). Had I seen it a month ago I would have had no hesitation in so naming it.

(Ed Wilson)

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The Flash: 09:25 – 10:30

(255th visit of the year)

Bird notes:
- Unusual these days to see so many geese. All the 55 arrivals came in together. The two Greylag Geese were buried in separate groups of Canadas rather than together.
- The Teal today were hiding in the top corner. I briefly saw the strange duck but thereafter it stayed hidden and only the two drakes were visible. Feedback suggests that this 'strange bird' is a first-winter drake slow to moult in to adult plumage. I will continue to try and get some better photos.
- After yesterday's glut of Moorhens a low number today. Too many dog-walkers at the weekend?
- The passage of Lesser Black-backed Gulls seen earlier of the lake continued for only a short while after I arrived.
- A Great Tit was heard in song. Spring already? I fear not.

Birds noted flying over here:
- 1 Common Buzzard
- 42 Lesser Black-backed Gulls
- 1 Jackdaw
- 2 Siskins

On /around the water:
- 60 Canada Geese: 53 of these flew in together
- 2 Greylag Geese: flew in with Canadas
- 3 + 2 (1 brood) Mute Swans
- 29 (19♂) Mallard
- 3 (2♂) Teal
- 2 (2♂) Pochard
- 48 (21♂) Tufted Duck
- 21 (14♂) Goosander
- 7 Moorhens: only
- 25 Coots
- 2 Great Crested Grebes still
- 73 Black-headed Gulls
- 2 Lesser Black-backed Gulls: both adults: both departed
- 2 Grey Herons

On / around street lamps:
- 1 Mottled Umber (Erranis defoliaria)

Around the Ivy:
- 1 Common Wasp (Paravespula vulgaris): eventually found amongst...
- c.25 flies of at least three species.

Otherwise:
- A Grey Squirrel on the island.

The Teal were hiding away this morning. Here is one of the drakes that put in a brief appearance.

It is difficult to get the contrast right but here is a half-decent photo of a drake Pochard that shows the vermiculations along the side. The black spot in front of the red eye is a blood blister.

One of the local Common Buzzard's catches the low winter sun.

No mistaking this well-marked Mottled Umber moth (Erranis defoliaria).

It took a while but I managed to find just one Common Wasp (Paravespula vulgaris) on the Ivy.

(Ed Wilson)

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On this day can be found via the yearly links in the right-hand column.


Sightings from previous years without links are below

2012
Priorslee Lake
3 Gadwall
9 Pochard
20 Tufted Ducks
1 (1) Goosander
155 Coots
28 Herring Gulls
1 Great Black-backed Gull
14 Redwings
2 Fieldfares
c.368 Jackdaws
97 Rooks
(Ed Wilson)

2009
Priorslee Lake
3 Cormorant
33 Mute Swans
Water Rail
13 Pochard
85 Tufted Ducks 
274 Coots
1000 Black-headed Gulls
2000 Lesser Black-backs
3 Yellow-legged Gulls
1 Great Black-backed
5 Redwings
2 Willow Tit
c.325 Jackdaws
20 Siskins
4 Reed Buntings
(Ed Wilson/John Isherwood)

2006
Priorslee Lake
3 Cormorants
15 Pochard
45 Tufted Ducks
1 eclipse drake Ruddy Duck
2 Sparrowhawks
2 Buzzards
1 Kestrel
>700 Black-headed Gulls
324 Lesser Black-backed Gulls
8 Herring Gulls
1 Great Black-backed Gull
649 Wood Pigeons
25 Robins
22 Blackbirds
16 Fieldfares
4 Song Thrushes
6 Redwings
322 Jackdaws
224 Rooks
2 Siskins
5 Reed Buntings
(Ed Wilson)

2005
Priorslee Lake
140 Golden Plover
8 Cormorants
900 Black-headed Gulls
c.250 Lesser Black-backed Gulls
13 Pochard
43 Tufted Duck
2 Little Grebes
225 Coot
371 Jackdaws
313 Rooks
6 Redwings
32 Fieldfares.
8 Reed Buntings
19 Robins
30 Blackbirds
16 Greenfinches
(Ed Wilson)