by Dennis Shirley
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General Information |
Gull Identification |
Immature Gulls |
Key to Adult Gulls |
Species List | |
Herring Gull (similar
species)
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Breeding Adult - pale gray mantle, large yellow bill with
orange spot near the gonys,
pale yellow eye with yellow eye-ring, angular head
Photo by Merrill Webb
©Merrill Webb
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Adult - limited dark tips, not sharply contrasting
by Kendall Brown
©Kendall W. Brown
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Non-breeding Adult - streaks on crown, back of neck and sides of upper
breast.
by Jack Binch
©Jack Binch
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Juvenile - grayish-brown streaked below and scaly above;
the back pattern becomes more barred and less uniform with age
by Ryan Houston
©Ryan Houston
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1st Winter - base of bill turning pink, gray appearing on mantle
by Kent Keller
©Kent R. Keller
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1st Summer - gray back with some mottling
by Kent Keller
©Kent R. Keller
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2nd Summer - no white spots on wing tips, brownish-gray on
wings
by Kendall Brown
©Kendall W. Brown
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2nd Year - dark tail band, no white in wing tips, patchy
gray and brown in wings
by Kendall Brown
©Kendall W. Brown
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Herring Gull
Similar Species
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Ring-billed
- Immatures are similar; Winter Ring-billed Gulls are less
streaked on the neck. Juveniles and first-winter Ring Billeds are paler overall than Herring Gulls especially on
the head and underparts; these areas are white with varying
amounts of black spotting on the back of the neck; Ring-billeds have a rounder
head. |
California
- has a smaller, thinner bill; adult Californias are darker on the
mantle, and have yellow legs and dark eyes |
Thayer's Gulls
- have a brown iris and usually little or no black on the
undersurface of its wing tips. 1st winter Thayer's has brown
outer primaries which are the same shade or slightly darker
than the rest of the upper wing surface. In standing gulls
the
primaries often show pale edges on the tips, and the
undersides of the wing tips are whitish. |
Lesser Black-backed Gull - are
smaller, with yellow legs and longer-wing appearance at
rest, and have much darker mantle and wings; the bill is
thinner without marked expansion at the tip. Adult and subadult
Lesser Black-backeds
have a darker gray mantle; immatures have darker inner
primaries and greater secondary coverts. |
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1st winter Ring-billed
- is lighter below, less streaked, has smaller, shorter bill,
and rounder head
Photo
by Ted Fitzgerald ©Ted
Fitzgerald
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Breeding Adult California
- smaller, less stout bill,
darker gray mantle,
yellow legs and dark eyes
Photo by Mike Ware
Copyright 2004 Mike Ware
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Adult Thayer's
- has a brown iris, smaller bill, smaller rounder head.
by Jack Binch
©Jack Binch
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Winter Lesser Black-backed Gull
- smaller, with yellow legs
and longer wing appearance at rest,
much darker mantle and wings, bill is thinner without marked
expansion at tip.
by Paul Higgins
©Paul Higgins
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