Gulls

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Author:
brideout
ID:
133872
Filename:
Gulls
Updated:
2016-05-01 17:35:53
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Bird ID
Folders:

Description:
NA Gulls
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  1. Juv/1st Winter Pale Inner pp
    • HERG
    • THGU
    • RBGU (above)
    • MEGU
  2. 3rd Winter
    • Like Ad but no white pp tips
    • Bills still like 2nd winter
  3. CAGU vs HERG
    • Longer pp projection
    • Narrower more pointed wings
    • Gray ss on UnW vs white in 3rd-4th
    • Parallel edged bill
    • Smaller and less bulky
    • Blue-grey to yellow legs vs pink
  4. CAGU vs THGU
    • Longer pp projection
    • Longer legs
    • Bicolored vs dark bill 1st cycle
    • Both have parallel edged bill 
    • Black vs brown wingtips 1st cycle
    • No pale inner pp panel
    • Black vs barred tail 1st cycle
  5. CAGU vs RBGU
    • Larger with longer bill
    • Grayish ss below vs white
    • Longer pp projection
    • More black in pp in adult
    • Similar mirrors in adult
    • Less contrasty 1st cycle
    • Brown vs white rump 1st cycle
    • 2nd cycle resembles 1st cycle
    • But dark vs gray gc
    • Dark vs pale iris
    • Blue-gray/yellow legs vs yellow
    • Red orbital ring in both
  6. Orbital Rings
    • Yellow: WEGU
    • Orange-yellow: HERG GLGU
    • Orange-red: RBGU
    • Red: CAGU
    • Raspberry-pink: THGU
    • Reddish-purple: GWGU
  7. Dusky Head Ad Basic
    • CAGU
    • HERG
    • THGU
    • RBGU
    • MEGU
    • GWGU
  8. Juv/1st Winter Dark ss
    • RBGU
    • CAGU
    • HERG
    • THGU
    • WEGU
    • MEGU
  9. Juv/1st Winter Pale ss
    • GLGU
    • GWGU
  10. Juv/1st Winter Dark gc
    • CAGU
    • WEGU (mod)
  11. Juv/1st winter Bicolored Bill
    • RBGU
    • CAGU
    • GLGU
    • HERG
    • MEGU
    • (WEGU)
  12. Juv/1st Winter White Rump
    • RBGU
    • GLGU
  13. Juv/1st Winter Pale Underwing
    • THGU
    • GLGU
    • GWGU
  14. 2nd Winter Pale Iris
    • RBGU
    • HERG (late winter)
    • WEGU
    • GWGU
    • GLGU
  15. 1st Winter Pale Inner pp
    • HERG
    • THGU
    • MEGU
    • RBGU (above)
  16. 2nd Winter White Tail
    • RBGU (98%)
    • MEGU (98%)
    • GLGU
  17. 3rd Winter Pale Iris
    • RBGU
    • HERG
    • THGU (some)
    • WEGU
    • GWGU
    • GLGU
  18. Dark Eyed Ad
    • CAGU
    • THGU (variable)
    • MEGU
  19. 2nd Winter Dark Bill
    • GWGU
    • LBBG (pale base below)
  20. GWGU x WEGU
    • Variably intermediate
    • Similar to THGU or SBGU
    • Bill structure is key
    • Ad dusky head (unlike WEGU)
  21. Adult Grey pp ss below
    • WEGU
    • CAGU
    • GWGU
  22. Adult White Underwing
    • RBGU
    • HERG
    • THGU
    • GLGU
    • MEGU
  23. Adult No Black in Wingtips
    • GWGU
    • GLGU
    • (THGU)
  24. Adult Small Black Wingtips
    • THGU
    • MEGU
    • BLKI
    • HERG
    • RBGU
  25. Adult Large Black Wingtips
    • CAGU
    • WEGU (ill-defined)
  26. Adult No Mirrors
    • GWGU
    • GLGU
    • (THGU)
  27. Adult Small Mirrors
    • RBGU
    • HERG
    • WEGU
  28. Adult Large Mirrors
    • CAGU
    • THGU (little black)
    • MEGU
  29. Adult HERG vs THGU
    • Larger and thicker billed
    • Slightly paler above
    • Blacker wingtips vs silver-grey
    • Bright yellow vs dirty yellow eyes
    • Shallower sloping forehead
  30. 3rd Cycle HERG vs THGU
    • Larger and thicker billed
    • Slightly paler above
    • Darker wingtips & tail
    • Contrastier pale panel
    • Shallower sloping forehead
    • Pale eye vs usually dark
  31. Pink Legs in Adults
    • WEGU
    • HERG
    • THGU
    • GWGU
    • GLGU
  32. LIGU 
    Larus minutus
    • Smallest gull
    • 2-3 cycles
    • Adult basic:
    • Pale gray above
    • White wingtips & trailing edge
    • Dark UnW
    • Black bill
    • Red legs

    • Juvenile:
    • Dark M
    • Dark ss and outer pp
    • Smudgy cap
    • Ear spots +/- connect to cap

    • Breeding:
    • Eurasian
    • Small population at Hudson Bay
    • Winter: Great Lakes, East Coast
  33. LBBG
    Larus fuscus
    • Smaller, more slender v HERG
    • 1st 2nd cycle very dark wings
    • Pale head, dark around eye
    • Pale iris by 2nd winter
    • Fierce look
    • Yellow legs by 3rd winter
    • Ad very dark above
    • Dusky head
    • Extensive black wingtips
    • Small mirror
    • Parallel edged bill, orange spot
  34. GBBG
    Larus marinus
    • Largest gull
    • Gray pp ss below (little black)
    • Large mirrors
    • 1st 2nd cycle contrasty spots
    • Less periocular streaks v LBBG
    • Pink legs v yellow in LBBG
  35. Yellow Legs (by 2nd Winter)
    • RBGU
    • CAGU
    • MEGU

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