Checklist S61181301

Sharing links

Owner Bill Rowe

Other participating eBirders
  • 2
  • 0.5 mi
Checklist Comments

With Tom Parmeter. Overcast, low 50's, little wind. Gulls were all at least 200 yards away at far end of main pond, or even farther, up on landfill; nonetheless, with good diffused light conditions and clear scope views, studies were productive. Passerines were in adjacent brushy/weedy areas.


  1. Number observed: 35
  2. Number observed: 12
  3. Number observed: 5
  4. Number observed: 4
  5. Number observed: 6
  6. Number observed: 2000

    Details: Adding together some estimates of birds on the water at the far east end, birds in the air over the crown of the landfill (distant), and birds resting along the slope of that crown (distant but scoped, grouped by 50's).

  7. Number observed: 100

    Details: Partly by count (up to about half this number) on the water, rest by observation of distant birds and assuming a low % of the Ring-bill population. On the water, all four age classes were observed, but majority adults.

  8. Number observed: 1

    Details: First-cycle bird, scoped carefully for 10 min. or more, at rest, in flight, and alighting on perches. Large Herring-type gull, mostly a smooth pale buffy-gray on head and underparts, with extensive white spangling or speckling on back and wings; size approximately that of nearby Herrings or a bit smaller; bill medium in length and "heft", all black. When perched, visible primaries and tertials dark brown, primaries edged with pale chevrons, notably visible when bird faced away from us briefly, showing primary pattern better; in flight, whole effect was like Herring but muted, paler and duller, including brownish tail and less contrasty inner primary "windows". Underside of primaries looked silvery grayish to whitish, especially upon just alighting and raising wings, when whiteness very obvious with just slight dark tips to outer primaries. Overall, showed all typical characters of this form. Not a small dainty bird as we are accustomed to put into our "search image" for Thayer's, but in fact the species can often be about the size of Herring.

  9. Number observed: 3

    Details: Two adults seen side by side; one first-cycle bird studied carefully at rest next to various Ring-bills and Herrings: intermedate in size, but closer to Ring-bill; fairly slim, with longer primary extension than either (thus longer, more attenuated look of whole bird); head whitish, lightly streaked, with some black coalescing around eye; bill medium, between the other species in length and "heft", all black; breast and belly with white ground color and much dark streaking; back and wings a fairly dark gray but with some white speckling and edging, more visible on coverts, barely visible on the back at long distance; couple of glimpses of white tail base contrasting with black tail band. General effect of an all-dark-backed, white-headed and -breasted gull. Hard to decide whether first cycle already having molted scapulars for darker, grayer ones, or 2nd cycle not yet having clear strong dark gray saddle. Besides this bird, there were at least two other good candidates on the water for first-cycle birds of this species. Possibility of 5+ present.

  10. Number observed: 1
  11. Number observed: 1
  12. Number observed: 1
  13. Number observed: 6
  14. Number observed: 1
  15. Number observed: X

    Details: 5000-10000+ up on landfill

  16. Number observed: 5
  17. Number observed: 2
  18. Number observed: 1
  19. Number observed: 2
  20. Number observed: 10
  21. Number observed: 4
  22. Number observed: 3
  23. Number observed: 1
  24. Number observed: 100
  25. Number observed: 2
Additional species seen by Tom Parmeter:
  1. Number observed: 1