29 May 25

Priorslee Balancing Lake and The Flash

12.0°C > 17.0°C: Mostly a low overcast with very occasional light drizzle. The sun briefly poked through as I was leaving. Moderate south-westerly wind. Good visibility.

Sunrise: 04:55 BST

* = a species photographed today
$ = my first sighting of the species for this year
$$ = my first ever recorded sighting of the species

Priorslee Balancing Lake: 05:10 – 06:15 // 07:25 – 09:50

(133rd visit of the year)

The Wesley Brook under the Priorslee Avenue tunnel is bit a mere trickle. There is a little more water flowing after the sluices empty near the Teece Drive gate.

Note the lake has much blue-green algae which can upset dogs if they drink any. It may also explain why so few of the juvenile Coots are surviving.

Bird notes:
- the Canada and Greylag goslings all still present and correct. A big arrival of >40 Canada Geese with c.20 noted flying off later.
- no Gadwall seen.
- the duck Pochard still here.
- the second Garden Warbler to arrive which has been singing continually for many days was not heard this morning. A bird at the East end of the South side that I have heard occasionally and intermittently was heard briefly.
- I did not hear the Common Whitethroat today but was only briefly in the area.
- the only Starling noted was an adult flying from the estate. All the other birds seem to have departed.

Bird(s) noted flying over here:
- 4 Canada Geese: two pairs outbound
- 8 Wood Pigeons
- 1 Herring Gull
- 9 Lesser Black-backed Gulls
- 2 Jackdaws

Counts from the lake area:
- 47 + 1 (1 brood) Canada Geese: of these 40 arrived and later c.20 departed
- 2 + 3 (1 brood) Greylag Geese
- 1 Mute Swan: the other resident assumed to be on the nest: see notes
- no Gadwall
- 6 (6♂) Mallard
- 1 (0♂) Pochard
- 3 Moorhens again
- 25 + 9 (4 broods) Coots
- *9 + >2 (2? broods) Great Crested Grebes
- 1 Lesser Black-backed Gull
- 1 Grey Heron: flew off West 06:00

Hirundines etc. noted:
- c.25 Swifts

Warblers recorded (the figure in brackets is birds noted singing):
- 1 (1) Cetti's Warbler
- 16 (13) Chiffchaffs
- 6 (6) Reed Warblers only
- 8 (8) Blackcaps
- 1 (1) Garden Warbler: see notes
- no Common Whitethroat

Noted on the West end street lamp poles around-dawn:

Moths:
- *1 Common Pug Eupithecia vulgata: my moth species #31 here this year

Flies
- *$$1 caddis fly, perhaps Sisyra nigra

Noted later:
Note: more wet foliage and overcast conditions.

Butterflies:
none

Moths
1 Plain Pollen-moth Micropterix calthella [was Plain Gold]
*1 Yellow-barred Longhorn Nemophora degeerella
3 Common Nettle-taps Anthophila fabriciana
2 Common Marbles Celypha lacunana
*$ 1 caterpillar of a Drinker Euthrix potatoria: my moth species #32 here this year
4 Silver-ground Carpets Xanthorhoe montanata
2 Straw Dots Rivula sericealis
***Another mammoth total for a dull day
I note the number of individuals as these records all go to the Shropshire recorders

Bees, wasps etc.:
Garden Bumblebee Bombus hortorum
Common Carder Bee Bombus pascuorum
*Early Bumblebee Bombus pratorum
unidentified wasp Vespula sp. - flew at me!
*sawfly Tenthredo sp. [not T. mesomela]
*another Tenthredo type

Hoverflies:
*Marmalade Hoverfly Episyrphus balteatus
Meadow Field Syrph Eupeodes latifasciatus [Broad-banded Aphideater]
Chequered Hoverfly Melanostoma scalare [Long-winged Duskyface]
Syrphus sp. S. ribesii / S. vitripennis

Dragon-/Damsel-flies:
*Blue-tailed Damselfly Ischnura elegans

Other flies:
Black Snipefly Chrysopilus cristatus
dagger fly Empis tessellata
cranefly Phylidorea ferruginea
Downlooker Snipefly Rhagio scolopaceus
Yellow Dung Fly Scathophaga stercoraria
plus
usual other boring and / or strange flies

Aphids:
*possible Large Blackberry Aphid Amphorophora rubi.

Bugs:
Mirid bug Calocoris alpestris

Beetles:
soldier beetle Cantharis nigricans
*larvae of Harlequin Ladybird Harmonia axyridis
*presumed Nettle Weevil Phyllobius pomaceus
*$$ Scarce Fungus Weevil Platyrhinus resinosus
*$ Cabbage-stem Flea Beetle Psylliodes chrysocephala

Slugs, snails etc.:
*$ Dusky Slug Arion subfuscus

Spiders, harvestmen etc.:
Metellina sp.
Long-jawed Orb-web Spider Tetragnatha sp.

New flowers for the year:
*$ Nipplewort Lapsana communis
*$ Honeysuckle Lonicera sp.

Once again about as good as it got!

Beware of blue-green algae.

A stand-off between a pair of Great Crested Grebes and another. I thought the pair on the left were the second pair to possibly have juvenile(s)...

...and indeed they do if you look hard between them. Only with the camera could I see this.

"An apple a day keeps the doctor away". I am not sure that applies to eating one in the middle of Teece Drive. This male Blackbird might need an ambulance (or worse).

An unusual location to find this Yellow-barred Longhorn moth Nemophora degeerella: on the fence alongside Teece Drive.

The Common Pug Eupithecia vulgata on one of the street lamp poles when I arrived.

A caterpillar of a Drinker moth Euthrix potatoria. Apologies it is not all in focus – it was angled away from me and I was unable to get square-on on because of brambles.

A very soggy Early Bumblebee Bombus pratorum. I know how it felt.

Obsidentify was 100% sure this sawfly is Tenthredo mesomela. I am sure it isn't as that species is apple green and while the camera does not always render colour that accurately it wasn't green. So Tenredo sp.

and another Tenthredo type.

Take a bow if you get the ID of this correct. It is...

...the underside of this (out of focus) Marmalade Hoverfly Episyrphus balteatus.

Just one damselfly seen this morning: this male Blue-tailed Damselfly Ischnura elegans.

Obsidentify was sure this caddis fly is Sisyra nigra. I am not too sure: the shape seems wrong though the venation seems about right.

My best suggestion for this is a Large Blackberry Aphid Amphorophora rubi.

This looks to be a Nettle Weevil Phyllobius pomaceus. It seems small but it is well out of context – on the rail of the 'boxing ring' on the dam. No nettles here.

I think this might help solve a mystery from yesterday. There are, I now believe, two larvae of Harlequin Ladybird Harmonia axyridis here. The one on the left is full-sized whereas the one on the right is an early instar and is smaller and lacks the full array of tufts.

There were several more of an intermediate form also on the Teece Drive fence: like this one.

Another challenge. I did not believe Obsidentify when it said "100% Scarce Fungus Weevil Platyrhinus resinosus" as it has no "weevil snout". But it was correct. As NatureSpot puts it "This is truly an odd looking creature and could hardly be confused with anything else". It not quite as scarce as the name implies. The larvae feed inside the fungus King Alfred's Cakes Daldinia concentrica.

I think this is a Cabbage-stem Flea Beetle Psylliodes chrysocephala.

The dark lines on its body seems to make this a Dusky Slug Arion subfuscus rather than the rufous form of (Great) Black Slug Arion sp. Here tucking in to Common Hogweed Heracleum sphondylium.

Growing alongside the West end path is Nipplewort Lapsana communis.

In a shady spot on a dull morning I found this flower of Honeysuckle Lonicera sp.

(Ed Wilson)

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In the Priorslee Avenue tunnel:

Moths:
*1 Green Carpet Colostygia pectinataria

Flies
no owl midges Psychodidae sp. [Drain Fly, Moth Fly or Owl Fly]
20 other midges of various species.

Arthropods:
1 Common Rough Woodlouse Porcellio scaber

A very fresh and smart Green Carpet moth Colostygia pectinataria.

(Ed Wilson)

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The Flash: 06:20 – 07:20

(130th visit of the year)

Bird notes:
- only five adult Mute Swans and the lone cygnet present. I did not explicitly see the resident cob but he seems to spend little time with his partner and it may have been he who was on the water perhaps preventing the adult with the Darvic ring '7JXV' from entering.
- I think I was mistaken in logging the all-white feral Mallard ('Aylesbury Duck') yesterday. It did look rather large from a distance and I did not look at it too hard. Today there was one of the mainly white feral geese that visit from time to time. It was with Greylag Geese and probably arrived with the party of c.25 that came in yesterday.
- only one Great Crested Grebe and that was nowhere near the site the pair seemed to be exploring yesterday
- the singing Reed Warbler for its sixth day. Let's hop he attracts a mate.

Bird(s) noted flying over here:
- 2 Lesser Black-backed Gulls.
- 1 Sparrowhawk

Noted on / around the water:
- 81 Canada Geese
- 2 Greylag Geese
- 1 mainly white feral goose
- 5 + 1 (1 brood) Mute Swans
- 21 (17♂) Mallard
- 5 Moorhens again
- 14 Coots only
- 1 Great Crested Grebe

Hirundines etc. noted:
None

Warblers recorded (the figure in brackets is birds noted singing):
- 8 (8) Chiffchaffs
- 1 (1) Reed Warbler
- 6 (6) Blackcaps
So: why were they so happy today!

Noted around the area:

Moths
*2 Yellow-barred Longhorns Nemophora degeerella
*1$ Lesser Swallow Prominent Pheosia gnoma

Bees, wasps etc.:
Early Bumblebee Bombus pratorum

Other flies:
dagger fly Empis tessellata
Grouse Wing caddis fly Mystacides longicornis
owl midge Psychodidae sp. [Drain Fly, Moth Fly or Owl Fly]
Yellow Dung Fly Scathophaga stercoraria
also numerous different midges and flies

Bugs:
Mirid bug Calocoris alpestris

Beetles:
Alder Leaf Beetle Agelastica alni

Spiders, harvestmen etc.:
*2 male harvestmen Leiobunum blackwalli

Not, as I logged yesterday, an Aylesbury Duck but a feral goose, sometimes one of several seen in the company of Greylag Geese.

A Sparrowhawk carrying prey.

Strangely it circled around rather than carrying its prey back to a nest. Hard to see the prey here but the barring on the breast identifies the Sparrowhawk as a male.

Another unusual location to find this Yellow-barred Longhorn moth Nemophora degeerella: on a street lamp pole in squirrel alley. I usually find them on vegetation.

I was even more surprised at this moth high up on the tallest lamp pole in squirrel alley. It was beyond 'flash' range so a poor photo but the salient ID feature of a white wedge at the wing tip identifies it as a Lesser Swallow Prominent Pheosia gnoma, my first here. I see the similar Swallow Prominent P. tremula on street lamp poles at the top end every year.

One of two male harvestmen Leiobunum blackwalli sitting side-by-side on a street lamp pole. Very modern. This one is missing a leg this early in the season.

(Ed Wilson)

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2013
Priorslee Lake
1 Sedge Warbler
5 Reed Warbler
(John Isherwood)

Long Lane, Wellington
2 Dunlin
1 Sanderling
(Andy Latham)

2009
Priorslee Lake
4 Tufted Ducks
Ed Wilson

2007
Priorslee Lake
Swifts
Kestrel
Great Black-backed Gull
(Martin Adlam)