Yellow-legged Gull x Herring Gull hybrid?, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Primary pattern undoubtably michahellis but still very heavily streaked around the nape and jizz more akin to Herring Gull.

Herring x Lesser Black-backed Gull hybrid, Richmond Bank, Cheshire, 29.02.12 (Ian Mckerchar)

Herring x Lesser Black-backed Gull hybrid, Richmond Bank, Cheshire, 29.02.12 (Ian Mckerchar)

Herring x Lesser Black-backed Gull hybrid, Richmond Bank, Cheshire, 29.02.12 (Ian Mckerchar)

Herring Gull, Richmond Bank, Cheshire, 18.02.12 (Ian McKerchar)

Whilst upper mandible deformities such as this are fairly common amongst juvenile and first winter birds, such a seriously 'hooked' upper mandible is rare in adults.

Herring Gull, Richmond Bank, Cheshire, 18.01.12 (Pete Berry)

A yellow-legged argenteus Herring Gull

Herring Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

A very brightly yellow-legged argenteus. Note also the particularly bright bill too.

Caspian Gull, Richmond Bank, 09.11.11 (Pete Berry)

Adult

Caspian Gull, Richmond Bank, 09.11.11 (Pete Berry)

Same adult

Caspian Gull, Richmond Bank, 10.11.11 (Pete Berry)

Same adult as on the 9th

Caspian Gull, Richmond Bank, 10.11.11 (Pete Berry)

Same adult as on the 9th

Caspian Gull, Stubbers Green, West Midlands, 27.11.11 (Rob Adderley)

Caspian Gull, Stubbers Green, West Midlands, 27.11.11 (Rob Adderley)

Caspian Gull, Stubbers Green, West Midlands, 27.11.11 (Rob Adderley)

Caspian Gull, Stubbers Green, West Midlands, 30.11.11 (Mike Baron)

A real brute of a bird!

Caspian Gull, Stubbers Green, West Midlands, 30.11.11 (Mike Baron)

Photo lightened to show the underside of P10

Caspian Gull, Stubbers Green, West Midlands, 30.11.11 (Mike Baron)

Caspian Gull, Albert Village Lake, Leicestershire, 22.12.11 (Mike Baron)

Adult

Caspian Gull, Richmond Bank, Cheshire, 07.02.12 (Jason Atkinson)

Classic adult

Caspian Gull, Richmond Bank, Cheshire, 07.02.12 (Jason Atkinson)

Caspian Gull, Richmond Bank, Cheshire, 07.02.12 (Jason Atkinson)

In-flight

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

First winter

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

A rather streaky headed bird

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

The streaked headed bird again, displaying the underside of P10

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

Another adult

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

Same adult showing the underside of P10

Yellow-legged Gull, Richmond Bank, Cheshire, 03.11.11 (Ian McKerchar)

Same adult showing the underside of P10

Yellow-legged Gull, Richmond Bank, Cheshire, 22.11.11 (Pete Berry)

Third calendar year

Yellow-legged Gull, Richmond Bank, Cheshire, 25.11.11 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 25.11.11 (Ian McKerchar)

First winter

Yellow-legged Gull, Richmond Bank, Cheshire, 13.12.11 (Pete Berry)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Another nice brute of an adult

Yellow-legged Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Same brute of a male again

Yellow-legged Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

An absolute brute of a male

Yellow-legged Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 22.01.12 (Pete Berry)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 22.01.12 (Pete Berry)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 28.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 28.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 28.01.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no.2

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no.2 showing the underside to P10

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no.3

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no.3 showing the broad, solid subterminal band on P5 and a small balck 'spot' on the outer web of P4

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no. 4

Yellow-legged Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Adult no.4 again

Yellow-legged Gull, Richmond Bank, Cheshire, 12.02.12 (Pete Berry)

Yellow-legged Gull, Richmond Bank, Cheshire, 12.02.12 (Pete Berry)

Yellow-legged Gull, Richmond Bank, Cheshire, 18.02.12 (Ian McKerchar)

Yellow-legged Gull, Richmond Bank, Cheshire, 18.02.12 (Ian McKerchar)

Yellow-legged Gull, Richmond Bank, Cheshire, 18.02.12 (Ian McKerchar)

Yellow-legged Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Iceland Gull, Richmond Bank, Cheshire, 17.12.11 (Ian McKerchar)

Second calendar year (?)

NEW! Iceland Gull, Moore NR, Cheshire, 04.01.12 (Mike Baron)

Juvenile

NEW! Iceland Gull, Moore NR, Cheshire, 04.01.12 (Mike Baron)

Juvenile

Iceland Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Second winter

Iceland Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Second winter

Iceland Gull, Richmond Bank, Cheshire, 06.01.12 (Ian McKerchar)

Second winter

Iceland Gull, Richmond Bank, 06.01.12 (Ian McKerchar)

Looked more juvenile like in plumage but the bill appeared faintly greenish to it's base and I felt sure I could see a pale iris at times which would indicate a second winter bird?

Iceland Gull, Richmond Bank, 06.01.12 (Ian McKerchar)

Looked more juvenile like in plumage but the bill appeared faintly greenish to it's base and I felt sure I could see a pale iris at times which would indicate a second winter bird?

Iceland Gull, Richmond Bank, Cheshire, 30.12.11 (Pete Kinsella)

Juvenile

Iceland Gull, Richmond Bank, Cheshire, 10.01.12 (Pete Kinsella)

Third winter (fourth calendar year)

Iceland Gull, Richmond Bank, Cheshire, 10.01.12 (Pete Kinsella)

Third winter (fourth calendar year)

Iceland Gull, Richmond Bank, Cheshire, 11.01.12 (Pete Berry)

Second winter (third calendar year)

Iceland Gull, Sandbach Flashes, Cheshire, 14.01.12 (Rob Adderley)

Iceland Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Adult

Iceland Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Adult

Iceland Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Adult

Iceland Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Second winter (third calendar year)

Iceland Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Second winter (third calendar year)

Iceland Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Second winter (third calendar year)

Iceland Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult

Iceland Gull, Richmond Bank, 19.01.12 (Ian McKerchar)

Adult again

Iceland Gull, Richmond Bank, 23.01.12 (Ian McKerchar)

Second winter (third calendar year)

Iceland Gull, Richmond Bank, 23.01.12 (Ian McKerchar)

Second winter (third calendar year)

Iceland Gull, Richmond Bank, 23.01.12 (Ian McKerchar)

Second winter (third calendar year), a second individual.

Iceland Gull, Moore NR, Cheshire, 26.01.12 (Jason Atkinson)

Second winter

Iceland Gull, Sandbach Flashes, 28.01.12 (Rob Adderley)

Juvenile

Iceland Gull, Richmond Bank, Cheshire, 11.02.12 (Ian McKerchar)

Second winter bird (third calendar year)

Iceland Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Cleaner headed adult

Iceland Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Cleaner headed adult

Iceland Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Second adult with more head streaking

Iceland Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Second adult with more head streaking

Iceland Gull, Richmond Bank, Cheshire, 29.02.12 (Ian McKerchar)

Juvenile, a long-staying and roaming individual which has also visited Greater Manchester, identified by the pinkish staining on the side of the head.

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Adult

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile

Iceland Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Juvenile/second winter

Iceland and Glaucous Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Great comparisson between adult Iceland Gull and second winter Glaucous Gull.

Glaucous Gull, Birkdale, Lancashire, 27.12.11 (Mike Baron)

Juvenile

Glaucous Gull, Birkdale, Lancashire, 27.12.11 (Mike Baron)

Juvenile

Glaucous Gull, Weld Road, Southport, Lancashire, 11.12.11 (Peter Welch)

Juvenile

Glaucous Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 11.01.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Second winter (third calendar year)

Glaucous Gull, Thurso, Highland, 26.02.12 (Peter Welch)

Second winter (third calendar year)