Checklist S54609768

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Owner Noah Arthur

Other participating eBirders
  • 2
  • 9.32 mi
Checklist Comments

Sunny, mild south wind, temperature in the 50s

Submitted from eBird Android, version 1.9.6


  1. Number observed: 4
  2. Number observed: 16
  3. Number observed: 24
  4. Number observed: 2
  5. Number observed: 3

    Details: 1 drake, 2 hens. Seen on lake surface near dam.

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Male 1
    Female 2
    Sex Unknown
  6. Number observed: 7
  7. Number observed: 3
  8. Number observed: 42
  9. Number observed: 5

    Details: 3 1st cycle birds, 2 adult birds (developing dark hood).

    Age & Sex:
    Juvenile Immature Adult Age Unknown
    Sex Unknown 3 2
  10. Number observed: 30
  11. Number observed: 500

    Details: Long line on the lake

  12. Number observed: 1

    Details: No pale window on primaries, dark trailing edge of secondaries,1st cycle bird, larger size than ring bill gulls. pictures to come

    More details added after downloading photos: This is a Herring-like 1st-cycle gull that lacks pale inner primary windows, which rules out American Herring and is spot-on for California Gull. The rest of the upperwing pattern is also classic California Gull: dark secondaries and dark greater covert bases, separated by a band of pale greater covert tips, form a double dark trailing edge. This bird also has the distinctive California Gull face pattern, with a dark "bandit mask" around each eye. The dusky bill is very unexpected on a 1st-cycle California Gull, especially this late in the season. In California, nearly all have neatly bicolored bills by November, and I don't think I've ever seen one with a bill this dark after December. However, all other features on this bird are perfect for California Gull, and I'm confident that's what it is. I really can't make it be anything else. (This makes me wonder if 1st-cycle California Gulls from the eastern part of the breeding range (presumably subspecies 'albertaensis') tend to be darker-billed than the birds from farther west that winter in California.)

  13. Number observed: 1

    Details: 1st cycle bird going into 2nd cycle, pale windows on inner primaries, head paler in color than body, mantle developing into silver color, pink legs. Larger size than ring bill gulls

  14. Number observed: 1

    Details: Full alternate plumage

  15. Number observed: 47
  16. Number observed: 178
  17. Number observed: 1
  18. Number observed: 14
  19. Number observed: 1

    Details: 1st year bird; diffuse white on under wing

  20. Number observed: 2
  21. Number observed: 7
Additional species seen by Donald Pendleton:
  1. Number observed: 1
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