20 May 19

Priorslee Lake, The Flash, Trench Lock Pool and Trench Middle Pool

Priorslee Lake:  04:25 – 05:50 // 06:45 – 09:15
The Flash:  05:55 – 06:40
Trench Lock Pool:  09:35 – 09:50 // 10:35 – 11:10
Trench Middle Pool:  09:55 – 10:30

8.0°C > 16.0°C:  Clear start gave way to low cloud breaking after 07:00. Sunny for a while and then puffy clouds. Light / moderate NNW wind. Very good visibility

Sunrise: 05:05 BST

Priorslee Lake:  04:25 – 05:50 // 06:45 – 09:15(132nd visit of the year)

Bird notes from today
- the pair of Tufted Duck seemed to emerge from the NW reeds. Less than five minutes later they had gone
- all three juvenile Great Crested Grebes were in the water some of the time
- most juveniles Coots in the open out in the sun. One of the previous broods seems to have been lost. Two new broods
- Tawny Owl in flight yet again this time hotly pursued by both Jays and Blackbirds
- probably the same Mistle Thrush that was heard singing yesterday was heard distantly from The Flash today, but not from here
- three Barn Swallows seen flying through at 05:30 – late migrants. Up to five later perhaps local birds
- five House Martins calling high over the estate at 05:40 – local birds back at last? Much later just four over the lake
- Linnet seen again in the SW area. Might be nesting here?

Bird totals

Birds noted flying over or flying near the lake
- 2 Canada Geese (outbound)
- 1 Black-headed Gull
- 1 Lesser Black-backed Gull
- 1 Feral Pigeon
- 6 Wood Pigeon
- 6 Jackdaws
- 2 Rooks

Hirundines etc. noted
- 8 Swifts
- 8 Barn Swallows
- 9 House Martins

Warblers noted (singing birds)
- 7 (7) Chiffchaffs
- 1 (1) Willow Warbler as usual
- 23 (21) Blackcaps
- 4 (4) Garden Warblers
- 2 (2) (Common) Whitethroats again
- 1 (1) Sedge Warbler
- 7 (7) Reed Warblers again

The counts from the lake area:
- 2 Mute Swans
- 6 (6♂) Mallard
- 2 (1♂) Tufted Duck again
- 1 Grey Heron, briefly
- 4 + 3 (1 brood) Great Crested Grebes again
- 1 Moorhen
- 19 + 21 (6 broods) Coots

On the lamp poles pre-dawn
- 1 spider sp.

Seen later while the sun was out
- 1 Green Long-horn (Adela reaumurella) day-flying micro moth
- >20 Red-and-Black Froghoppers (Cercopis vulnerata)
- 1 Harlequin Ladybird (Harmonia axyridis), form succinea again
- >5 Scorpion Flies (Panorpa communis)
- 1 Dagger fly (Empis livida)
- 1 Common Wasp (Vespula vulgaris)
- 1 Common Carder Bumblebee (Bombus pascuorum)
- 1 Buff-tailed Bumblebee (Bombus terrestris)
- 1 mining bee and probably Andrena scotica
- 1 possible plasterer bee, perhaps Hylaeus communis
- 1 Melanostoma scalare (Chequered Hoverfly)
- 2 Syrphus sp. hoverflies
- male and female Common Blue Damselflies
and
- first flowers of Common Bird's-foot Trefoil (Lotus corniculatus)

The day looked promising – then the low cloud started to roll in.

Not quite so handsome now as this drake Mallard begin to moult in to ‘eclipse’ plumage after the breeding season – yes: it is all over for another year for some species.

Here he is alongside one yet to commence moult. The plain greeny bill will be retained and is the easiest way to sex these birds during the moult.

All-aboard!

Growing fast they already look almost too large for the parent’s back.

Someone has spotted something .... 

FOOD!

“Sorry son, your brother ate it” – of course we (or at least I) cannot sex the adults, let alone the juveniles, but why spoil a good line.

My what a long tail you have! 

“Who? me?” (actually a different bird).

A great pose by this adult Long-tailed Tit.

A species not often out in the open – a female Bullfinch, sadly while it was still cloudy and hence rather dull herself.

Yummy! a male Reed Bunting with food for its off-spring. Seems to include a Garden Spider as well as some wiggly things.

And a female Reed Bunting from a different pair is also collecting food.

My first Scorpion Flies (Panorpa communis) of the year today. Here is one of them.

A Common Wasp (Vespula vulgaris). At the time I thought it rather large and perhaps a queen, but upon reflection I think not.

I am far from certain about this, but I suspect it is a species of plasterer bee and perhaps Hylaeus communis
This bee is easier – a Common Carder Bumblebee (Bombus pascuorum). I do like these gingery hairy beasts.

This is also somewhat easier – a Buff-tailed Bumblebee (Bombus terrestris).

It was a ‘bee-day’. This I think is a mining bee and probably Andrena scotica (no vernacular name).

Newly-emerged this damselfly has yet to acquire its colour. It is a male Common Blue Damselfly.

While this is a newly-emerged female Common Blue Damselfly.

This is a Green Long-horn (Adela reaumurella) – a day-flying micro moth.

I tried another angle in an attempt to ‘see through’ the metallic-looking wings – without too much success! We can see some of the scales on the wing are wearing off.

This is Common Bird's-foot Trefoil (Lotus corniculatus), food plant for Common Blue butterfly.

(Ed Wilson)

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The Flash:  05:55 – 06:40

(125th visit of the year)

Notes from here:
- the Mute Swans now have just four cygnets. I was told one of the cygnets had a damaged leg and was taken in to care by Cuan Wildlife Rescue. No-one seemed sure what happened to the sixth cygnet
- just the one brood of eight Mallard ducklings located
- after three Great Crested Grebes yesterday I noted just one today and that seemed to disappear
- the Garden Warbler was singing away again so perhaps it has been here all along. One heard calling may or may not have been a different bird. Might they nest here?

Birds noted flying over / near The Flash
- 1 Jackdaw again

Hirundines etc. noted
- 2 Swallows

Warblers noted (singing birds)
- 3 (3) Chiffchaffs
- 1 (1) Willow Warbler as usual
- 5 (4) Blackcaps
- 2? (1) Garden Warblers (see notes)

The counts from the water:
- 3 + 4 Mute Swans (see notes)
- 28 Canada Geese
- 20 (15♂) + 8 (1 brood) Mallard
- 10 (7♂) Tufted Ducks
- 1 Great Crested Grebe
- 4 Moorhens again
- 22 + 3 (1 brood) Coots again

(Ed Wilson)

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Between the lake and The Flash

At or around the lower pool (singing birds)
- 1 Moorhen again
- 2 (1) Chiffchaffs
- 1 (1) Blackcap
- 1 (1) Goldcrest once again

At or around the upper pool (singing birds)
- 1 (1) Blackcap
- 1 party of Long-tailed Tits

(Ed Wilson)

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Trench Lock Pool:  09:35 – 09:50 // 10:35 – 11:10

(26th visit of the year)

Notes from here
- one of the two Mute Swans again sitting throughout
- I would judge that today I saw a different brood of just three Canada Goose goslings. Last week’s five goslings were, as far as I recall, larger even then
- pair of Great Crested Grebes with two juveniles
- two Grey Wagtails only glimpsed so unable to age / sex them
and
- 1 ‘blue’ butterfly. Rather early for Common Blue?

Birds noted flying over / near here [other than local Wood Pigeons and Jackdaws]
- 3 Common Buzzards
- 2 Lesser Black-backed Gulls
- 1 Stock Dove
- 3 Starlings

Hirundines etc. noted
- 4 Swifts

Warblers noted (singing birds)
- 5 (5) Blackcaps

The counts from the water
- 2 Mute Swans
- 3 + 3 (1 brood) Canada Geese
- 5 (4♂) Mallard
- 1 (1♂) feral Mallard
- 2 + 2 (1 brood) Great Crested Grebe
- 2 Moorhens
- 14 + 9 (3 broods) Coots

Feeding time for the Great Crested Grebes here too. I must say the size of the prey item seems more appropriate than the monsters being given to the young at the lake. Junior fell off in his haste to get the food.

“Up periscope” for ... 

... The next food arrival. 

(Ed Wilson)

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Trench Middle Pool:  09:55 – 10:30

(26th visit of the year)

Notes from here
- the Mute Swans spending more time together but no nest site obvious
- the geese do not seem to be having a good year: new brood(s) of Greylag Geese but fewer goslings than a week ago. Some additional goslings still being brooded? Meanwhile the Canada Geese seem to have lost all their goslings
- a pair of Great Crested Grebes with juveniles: too far away to determine how many
- spotty juvenile Robin seen
- one Grey Wagtail here. A female calling incessantly. Young nearby?
and
- an Oedemera nobilis beetle – the green one with the thickened thighs
- first flowers of Common Bird's-foot Trefoil (Lotus corniculatus) here as well as at the lake
- also flowers of Wood Avens (Geum urbanum)

Birds noted flying over / near here
None

Hirundines etc. noted
None

Warblers noted (singing birds)
- 1 (1) Chiffchaff again
- 5 (5) Blackcaps

The counts from the water
- 2 Mute Swans
- 16 + >12 (3? broods) Greylag Geese
- 47 Canada Geese
- 14 (12♂) + 5 (1 brood) Mallard
- 2 (1♂) Tufted Ducks again
- 2 + ? (1 brood) Great Crested Grebe
- 5 + 1 (1 brood) Moorhens
- 12 + 13 (5 broods) Coots

Now just what is this Greylag Goose hiding? Is it brooding some goslings? 

These goslings are inquisitive and don’t want to be brooded.

An intriguing Grey Wagtail. The birds was calling more or less continually as if it was a juvenile begging for food. Seemed quite happy to forage though. The dark bill suggests this must be an adult female. Many females, but not all, acquire a dark throat. This one does seem to have a few black spots.

The legs do look rather pale and the fringing on the feathers looks rather pronounced for an adult that should not have moulted as yet.

Singing away! 

The breast is so bright I am sure it must be an adult female. A noisy one too.

An inquisitive Chiffchaff – black feet, rather weak supercilium and prominent eye-crescents.

Having decided I am harmless it carried on. Note how the angle affects the perception of the supercilium – much more obvious here.

And a classic view – we even see some olive tones which, to my eyes, are rarely visible in the field.

On a dandelion the beetle Oedemera nobilis: bright green and with thickened thighs. No ‘regular’ vernacular name, variously false oil beetle, thick-legged flower beetle or swollen-thighed beetle.

(Ed Wilson)

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On this day..........
2016
Priorslee Lake
Today's Sightings Here

2015
Priorslee Lake
Today's Sightings Here

2012
Priorslee Lake
Black Tern
(Ed Wilson)

2006
Priorslee Lake
2 Ruddy Ducks
(Ed Wilson)