7 Jul 20

Priorslee Lake, The Flash and Woodhouse Lane

12.0°C > 13.0°C: Started with broken clouds at multiple levels after late night drizzle. Increasing high cloud with rain starting c.09:00. Calm start with light SW breeze later. Very good visibility.

Sunrise: 04:56 BST

NB: * means there is a photo today.

Priorslee Lake: 04:15 – 06:00 // 07:00 – 07:25 // 08:25 – 09:30

(131st visit of the year)

Bird notes:
- Two Mute Swans circled to the N before thinking again about landing.
- First Greylag Geese seen post wing-moult
- A trio of Tufted Ducks dropped in at 04:50, staying less than a minute.
- Another returning Common Sandpiper. Again unable to get close-enough to age it.
- A single Starling seen flying over on exactly the same line for the second day. Could it have been roosting in the reeds here?
- A fly-over Siskin was an exceptionally early post-breeding record. Heard later over Woodhouse Lane going the other way.
- A fly-over Common Crossbill was an equally unlikely record. I checked the date of the bird I had over The Flash last year – it was July 30th: so perhaps not such a strange date. For me bird species #91 at the lake in 2020

Birds noted flying over / near here:
- 2 Mute Swans
- 2 Greylag Geese: pair outbound
- 21 Cormorants (party of 19; then duo)
- 1 Sparrowhawk
- 16 Lesser Black-backed Gulls: not all ages determined
- 39 Wood Pigeons
- 1 Collared Dove again
- 23 Jackdaws
- 4 Rooks only
- 1 Starling again
- 1 Siskin (see notes)
- 1 Common Crossbill (see notes)

Hirundines etc. logged:
- 12 Swifts
- 3 House Martins

Count of warblers logged (singing birds in brackets):
Significant decline in song the last few days
- 13 (6) Chiffchaffs
- 10 (7) Blackcaps
- 1 (1) Garden Warbler again
- 4 (3) Common Whitethroats
- 10 (7) Reed Warblers again

Counts from the lake area:
- 2 + 5 Mute Swans
- 18 (?♂) Mallard again
- 3 (?♂) Tufted Duck: very briefly
- 2 or 3 Grey Herons: one (of two) flew off 04:25; one flew in / returned 05:20
- 10 Great Crested Grebes
- 4 + 1 (1 brood) Moorhens
- 35 + 13 (8 broods) Coots
- 1 Common Sandpiper
- 2 Black-headed Gulls: both adults

On / around the street lights etc. pre-sunrise:
- 1 Common Grey moth (Scoparia ambigualis)

On the wall of the academy beside the security light
- Common Green Lacewing (Chrysoperia carnea)

Insects / other things etc. noted later as the rain started:

The insect etc. list in full:

Butterflies:
- Red Admiral (Vanessa atalanta)

Moths:
- Garden Grass-veneer moth (Chrysoteuchia culmella)
- *Cinnabar (Tyria jacobaeae)

Bees / wasps:
- Field Cuckoo Bumblebee (Bombus campestris)
- Red-tailed Bumblebee (Bombus lapidarius)
- Buff-tailed Bumblebee (Bombus terrestris)
- Common Wasp (Vespula (Paravespula) vulgaris)

Damsel-/Dragon-flies:
- Common Blue Damselfly (Enallagma cyathigerum)

Hoverflies:
- Marmalade Hoverfly (Episyrphus balteatus)
- *Pied Hoverfly (Scaeva pyrastri)

Bats:
None

Other things:
- Common Green Capsid (Lygocoris pabulinus)
- Potato Capsid (Closterotomus norwegicus)
- Common Froghopper (Philaenus spumarius)
- Harlequin Ladybird (Harmonia axyridis): pupae only
- 7 Spot Ladybird (Coccinella 7-punctata)
- Mystacides longicornis (caddis fly)
- Common Red Soldier Beetle (Rhagonycha fulva)

Additional flowering plant species recorded for the year at this site:
None

Red sky in the morning often portends rain. It was not wrong.

One for cloud enthusiasts

An adult Black-headed Gull of course. The dark hood is just starting to fade around the base of the bill. The folded wings do not look quite right.

And this is why the folded wings looked odd. Only the outer five primaries have been (so far) retained and the inners are regrowing. The 'gap' is where the outer secondaries have been dropped.

A juvenile Robin complaining about something.

An unmistakable moth – a Cinnabar (Tyria jacobaeae). Amazing to thing the caterpillars are banded yellow and black.

A very distinctive hoverfly with no yellow. It is a Pied Hoverfly (Scaeva pyrastri).

(Ed Wilson)

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The Flash:  06:05 – 06:55

(116th visit of the year)

Bird notes:
- The goslings not seen. All the geese had been flushed off of Teece Drive by dogs and they may have taken refuge from the Mute Swan by jumping on to the island.
- Only nine Mallard seen, again seven of these together as a possible full-grown family group.
- So where have all the Tufted Duck come from? Many hard to sex now, especially as some were continually diving.
- Whenever I see House Martins here they appear, fly around, and leave again. Very hit and miss and they do not seem to be breeding very close-by.
- The male Reed Bunting was in full voice at the top end again – the last few days he has been along the E side.

Birds noted flying over / near The Flash:
- 1 Feral Pigeon

Hirundines etc. logged:
- 1 Swift
- 2 House Martins

Count of warblers logged (singing birds in brackets):
- 2 (2) Chiffchaffs again
- 3 (3) Blackcaps

Counts from the water:
- 3 + 7 (1 brood) Mute Swans
- 64 Greylag Geese
- no Greylag x Canada Geese
- 82 Canada Geese
- 9 (?♂) Mallard only (see notes)
- 30 (25?♂) Tufted Duck
- 2 + 2 (1 brood) Great Crested Grebes
- 4 Moorhens
- 12 + 15 (6 broods) Coots

Otherwise of note, all on different lamp poles:
- 1 Garden Grass-veneer moth (Chrysoteuchia culmella)
- 1 Common European Earwig (Forficula auricularia)
- 1 Cucumber Green Orb Spider (Araniella cucurbitina)
- *The exoskeleton of a Stretch-spider (Tetragnatha sp.)
- 1 Leiobunum rotundum harvestman on a different lamp pole

A bunch of teenagers still in bed (four juveniles and one adult on the far right). Despite their age I have yet to see this group take to the water – always in bed when I pass.

Apparently the collective noun for a group of Magpies is a 'mischief'. They seem to have had a very successful breeding season and there are far too many of these birds around. At least two families here.

I can only suggest that this is the exoskeleton of a Stretch-spider (Tetragnatha sp.), cast off as it grows a new and larger 'skin'. I suppose it could just be dead, though dead things are usually attacked and dismantled very quickly.

(Ed Wilson)

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Between the lake and The Flash:

Of note:
- 1 Small Fan-footed Wave moth (Idaea biselata) on a lamp pole
- *1 Single-dotted Wave (Idaea dimidiata) on another lamp pole
- 1 Stretch-spider (Tetragnatha sp.) on a third lamp pole
- The same unidentified spider sp. as yesterday on the wall of the Priorslee Avenue tunnel.

This has to be a Small Fan-footed Wave moth (Idaea biselata), though much more boldly marked than shown in many books. It may look like a Riband Wave but was only two-thirds the size, more brown-toned and sits with wings held more horizontally.

(Ed Wilson)

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Woodhouse Lane area: 07:25 – 08:25

(10th visit of the year)

Notes from here:
- Unusual to record all three species – Swifts, Barn Swallows and House Martins – over the fields
- Neither sight nor sound of any Yellow Wagtails. A juvenile Pied Wagtail in the concrete road was the only wagtail I recorded here.
- The Siskin over here was perhaps the bird that flew the opposite way over the lake earlier.

Notable species counts (singing birds in brackets):
- 1 Common Buzzard
- 2 Swifts
- 1 Jay
- 4 (4) Skylarks
- 2 Barn Swallows
- 4 House Martins
- 3 (2) Chiffchaffs
- 5 (1) Blackcap
- *4 (2) Common Whitethroats
- 1 (1) Song Thrush
- no Yellow Wagtails
- 1 Pied Wagtail: juvenile
- 4 (1) Chaffinches
- 2 (0) Greenfinches
- 4 (0) Goldfinches
- 5 Linnets
- *5 (1) Yellowhammers
- 1 Siskin: overhead
- 1 (1) Reed Buntings

Insects etc. noted:
Strangely no butterflies. Could they have detected the on-coming rain and stayed hidden?.

Moths:
- *Yellow Shell (Camptogramma bilineata)

Bees / wasps:
- Buff-tailed Bumblebee (Bombus terrestris)

Damsel-/Dragon-flies:
None

Hoverflies
- *Chrysotoxum bicinctum
- Marmalade Hoverfly (Episyrphus balteatus)
- Pied Hoverfly (Scaeva pyrastri)
- Syrphus sp.

Other things
- *Tiger Cranefly (Nephrotoma flavescens)
- *Nephrotoma flavipalpis cranefly

Additional plant species recorded for the year at this site:
- *Arum Lily (Arum maculatum): not new but berries now visible
- *Scented Mayweed (Matricaria chamomilla)

A Common Whitethroat with goodies for the nestlings.

I have struggled to get any sort of photo of Yellowhammers this year. This male lurking in a large tree was as good as it has got so far.

A Yellow Shell moth (Camptogramma bilineata). I saw my first-ever specimen of this species about ten years ago more or less in the same spot.

I was pleased to find this very distinctive hoverfly Chrysotoxum bicinctum. I see it most years but rarely more than single specimens. It is confusingly similar to one of the Thick-headed Fly species Conops flavipes - which I have yet to see.

This is a male Nephrotoma flavipalpis cranefly. Note the dark stigma in the wings and compare with...

...a female Tiger Cranefly (Nephrotoma flavescens) with unmarked wings (apart from the veins).

The Arum Lilies (Arum maculatum) that I logged as fruiting spikes in May now have their berries. I note that my Illustrated Flora does not acknowledge the 'lily' epithet and names this plant either Lords and Ladies or Cuckoo Pint.

Scented Mayweed (Matricaria chamomilla) here. The only way I can separate this from Scentless Mayweed (Matricaria perforata) is to crush the feather-looking leaves and see whether they smell.

(Ed Wilson)

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On this day..........
2019
Priorslee Lake
Today's Sightings Here

2014
Priorslee Lake
Today's Sightings Here

2011
Priorslee Lake
Lesser Whitethroat
(John Isherwood)

2010
Priorslee Lake
2 Common Sandpipers
3 Common Terns
Kingfisher
50+ Swifts
(Ed Wilson)

2007
Priorslee Lake
1 drake Ruddy Duck
(Martin Adlam)