Saturday, 24 July 2010

24th July 2010 Beachy Head Calm

Gannet 30E
Whimbrel h
Sandwich Tern h
Swallow 6W, 4
Pied Wagtail 1
Stonechat 1
Grasshopper Warbler 6 ex.
Sedge Warbler 1
Reed Warbler 3
Chiffchaff 1
Willow Warbler 6
Blackcap 2
Garden Warbler 1
Lesser Whitethroat 1
Whitethroat 25
Corn Bunting h

Dark Green Fritillary 4
Comma 3
Marbled White 8
Peacock 3
Red Admiral 4
Meadow Brown 20
Gatekeeper 15
Small Heath 1
Small Copper 2
Chalkhill Blue 70
Common Blue 5
Large Skipper 1
Silver-spotted Skipper 2

Hummingbird Hawk Moth 1 ex.

Migrant Hawker 1 ex.

Grasshopper Warbler at Birling Gap
The Migration Atlas states that the Autumn migration of juveniles passing through southeast England show three distinct peaks representing the passage of three broods roughly in late July, late August and late September. Adults typically pass through in late August and September.

Grasshopper Warbler at Birling Gap
A more heavily streaked and yellow-suffused individual

Chiffchaff at Birling Gap
The Migration Atlas states that seemingly random short-distance dispersive movements commence in July and continue into September. These merge into a more definite migratory movement that commences in late August and peaks in the second half of September.

Adult Herring Gull at Birling Gap

Juvenile Reed Warblers at Belle Tout
The Migration Atlas states that up to 30% of Reed Warblers are double-brooded. The first brood juveniles are similar in their timings of their Autumn migration to adults in that they start to leave their breeding sites in late July, with their peak passage across the south coast in the last third of August. Juveniles are characterised by their warm rusty-brown upperparts and buff flanks.

Common Blues in the Beachy Head Hotel Garden

Silver-spotted Skipper at Belle Tout

Immature male Migrant Hawker at Cow Gap
The UK's breeding population is boosted by migrants from continental Europe in the autumn.

Hummingbird Hawk Moth in Whitbread Hollow

Silver-y Moth in Whitbread Hollow

Tachina grossa in Cow Gap
At an impressive 15-19mm in length this is Europe's largest Fly