12 Dec 22

Priorslee Lake and The Flash

-1.0°C > 0.0°C: Low cloud / mist. Some snow / ice on the ground. Calm. Poor visibility

[Sunrise: 08:12 GMT]

* = a photo from today.

I slithered around The Flash before visiting the lake.

Priorslee Lake: 11:25 – 12:25

(251st visit of the year)

Viewing only from the Castle Farm Way lay-by and dam-top. Still c.50% mainly thin ice.

Bird notes:
- Yesterday's Common Teal not located. A duck Eurasian Wigeon was new in.
- More Tufted Duck seemed to have moved on.
- A good variety of gulls with birds coming and going and more passing uncounted overhead.

Counts from the lake area:
- 2 Canada Geese again
- 2 + 4 (1 brood) Mute Swans
- 6 (4♂) Gadwall again
- 1 (0♂) Eurasian Wigeon
- 6 (5♂) Mallard
- 4 (3♂) Pochard
- 40 (18♂) Tufted Duck
- 8 Moorhens
- *178 Coots
- 3 Great Crested Grebes
- 66 Black-headed Gulls
- *1 Great Black-backed Gull
- *1 Common Gull
- *15 Herring Gulls
- *2 Yellow-legged Gulls
- *1 possible Caspian Gull
- *107 Lesser Black-backed Gulls
- *2 Cormorants

Also noted.
Nothing else

It was a 'gull day' with plenty to search through. The weather was both good and bad. Good in that there was flat lighting making judging the relative mantle tones of the birds easy. Bad because the light-level was low and the misty conditions did not allow good photos. With that proviso lets see what we can find. All but three of these are Lesser Black-backed Gulls. The right-most bird is a Herring Gull. Of the two in the middle a Herring Gull is at the back. The one at the front I'll come back to.

Here an adult winter Great Black-backed Gull is in front of a similarly-aged Lesser Black backed Gull. The Great Black-backed is probably a female as it is not obviously that much larger but note the mantle is jet black rather than dark charcoal-grey, the head shows no streaking and the bill is more massive. This species is not common away from coasts. I usually see a few in any mid-Winter cold snap.

The gull of interest here is third from the right. Its small size, rather weak bill and dark eye identifies it as an adult winter Common Gull. Not at all a common gull in this part of Shropshire. Confirmation is that the mantle is darker than the Herring Gull on the extreme left but paler than the Lesser Black-backed Gulls (and the Carrion Crow).

Here it is on the water showing its size relative to a Lesser Black-backed Gull and also its dark eye.

Directly in front of the green buoy is a very white-headed gull whose mantle is darker than a Herring Gull but paler than the accompanying Lesser Black-backed Gulls. It is an adult Yellow-legged Gull. At this age they almost never show any head streaking.

Here it is second from left with two Herring and two Lesser Black-backed Gulls. The legs do indeed look yellow, certainly compared with the Herring Gull on the extreme right.

The gull front right is one I am not totally convinced about. The mantle is only slightly darker than the Herring Gull behind it and it has a dark eye. These suggest it might be a Caspian Gull but it seems rather small and perhaps the head and nape are too streaked.

And again: second from the front.

Here it is wing-flapping. Sadly there was not enough light for the camera to freeze the action and show the exact pattern of white on the wing-tip. This would have provided a positive ID. There is enough to indicate it is not a Herring Gull but not to eliminate Yellow-legged Gull. There is a rather puzzling restricted amount of black on the outer wing. A Cormorant photo-bombing the shot.

Some winter adult Lesser Black-backed Gulls show extensive dark streaking on the head and some don't: I have never read any explanation for this. This one, head-on behind a Coot, is about as streaked as they get and gives the bird a hooded effect. If this were to be seen on a Herring-type gull there would be an invasion of bird-watchers as that would indicate an Azorean Gull. Not impossible and I'll keep watching.

(Ed Wilson)

------------------------------------------------------------------------------------------------------

The Flash: 10:25 – 11:20

(243rd visit of the year)

Mostly iced over with a clear area around one of the footbridges and another close around the island.

Bird notes:
- I was surprised not to see or here any Redwings. Normally harsh weather and snow brings them in to the suburbs.

Noted on / around the water
- 10 Canada Geese
- 2 + 4 (1 brood) Mute Swans
- 41 (25♂) Mallard
- 1 all-white duck (Peking(?) Duck)
- 2 (2) Tufted Duck
- 8 Moorhens
- 43 Coots again
- *128 Black-headed Gulls
- *1 Herring Gull
- *3 Lesser Black-backed Gulls
- *2 Grey Herons

Noted elsewhere:
- Grey Squirrel

Very smart. A second winter Herring Gull with a combination of new and retained feathers obvious on the mantle.

Well I suppose it keeps the feet warm but... An adult winter Black-headed Gull rests on the ice.

The darkest-headed adult winter Lesser Black-backed Gull I noted here.

I suppose standing on one foot reduces the heat-loss. This Grey Heron has a good collection of 'aigrettes' as it comes in to breeding condition. Herons will be repairing their nests, and stealing twigs from neighbours in heronries, from mid-January onwards.

Not too badly obscured by a twig is one of the party of Long-tailed Tits foraging alongside squirrel alley.

It was a twig day. Here one gets in the way of a Goldfinch's attempt to brighten a gloomy day.

(Ed Wilson)

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

Sightings from previous years without links are below

2013
Priorslee Lake
2 Scaup (imm/fem)
4  Pochard
2 Teal
2 Goosanders
101 Tufted Duck
Adult Yellow-legged Gull
c.478 Lesser Black-backed
c30 Herring
c.5 Great Black-backed Gulls
1 Water Rail 
245 Coots
18 Fieldfare
201 Redwings
2 Siskins
(Ed Wilson/Gary Crowder)

2012
Priorslee Lake
1 Yellow-legged Gull.
Great Black-backed Gull
2 Gadwall
2 Teal
45 Tufted Ducks
1 Goosander
10 Redwings
2 Fieldfares
(Ed Wilson/Martin Grant)

2011
Priorslee Lake
2 Yellow-legged Gulls
c300 Lesser Black-backed Gulls
11 Great Black-backed Gulls
(Tom Lowe)

2009
Priorslee Lake
Black-necked Grebe
Little Grebe
36 Swans
29 Pochard
79 Tufted Ducks
1 Water Rail
277 Coots
5 Redwings
(Ed Wilson/John Isherwood)

2008
Priorslee Lake
2 Yellow-legged Gull
7 Great Black-backed Gull
4 Gadwall
45 Golden Plover
( John Isherwood) 

2006
Priorslee Lake
1 Little Grebe
5 Cormorants
25 Pochard
44 Tufted Ducks
72 Coots
>2000 Black-headed Gulls
228 Lesser Black-backed Gulls
15 Herring Gulls
25 Robins
16 Blackbirds
31 Fieldfares
5 Redwings
278 Jackdaws
105 Rooks
32 Starlings
7 Reed Buntings
(Ed Wilson)

2005
Priorslee Lake
Water Rail
2 Little Grebes
7 Great Crested Grebes
16 Pochard
54 Tufted Duck
244 Coot
262 Jackdaws
285 Rooks
1 Redpoll
24 Siskins
21 Pied Wagtails
2 Grey Wagtails
8 Redwings
15 Fieldfares
13 Reed Buntings
13 Robins
19 Blackbirds
1 Willow Tit
14 Greenfinches
(Ed Wilson)