Checklist S48771719

Sharing links

Owner Brad Jacobs

Other participating eBirders
  • 3
Checklist Comments

Brad Jacobs, Paul McKenzie, and Pete Monacell at Thomas Hill Reservoir. Paul spotted a Laughing Gull and we all got good looks at it from several hundred yards. The light was not good and there were heat waves when the gulls got close to the water. I have included photos of first cycle Franklin's Gulls and Laughing Gulls that were present, but I didn't get a first cycle Ring-billed which would have a light window in the outer wing. The sky and sun angle made all the gulls look relatively gray in the photos, and there was a lot of glare on the birds depending on where they were. But in the scope there was a rosy caste on several of the Franklin's Gulls and the inner wings of the Laughing Gull was a gray-brown with the outer wings black.

Submitted from eBird for iOS, version 1.7.36


  1. Number observed: 20
  2. Number observed: 2
  3. Number observed: 30
  4. Number observed: 1
  5. Number observed: 1

    Details: The 1st-winter Laughing Gull (LAGU) was flying among a ring-billed gulls and Franklin’s Gulls (FRGU) that comprised a several hundred meter long raft of closely spaced birds. The LAGU was larger and had longer and narrower wings that the FRGU. The photos of FRGUs illustrate the shorter and broader wings than those of the LAGU. The LAGU was staying outside the raft of gulls and occasionally diving to the water, taking off again and occasionally staying on the water for several minutes. The raft was several hundred meters out in the Thomas Hill Lake and we were on Parking Lot D – Gull Point.
    The LAGU was first spotted by Paul McKenzie and Pete and I quickly located it in the scopes. The long narrow wings had black outer wings and a lighter grayish-brown inner wing. There was a 1 inch to 1-1/2 inch black sub-terminal band on the all of the tail rectrices including the outer rectrices. There was a narrow, terminal, white band at the distal end of the tail. The bill appeared all black, but it was hard to see more on the bill at that distance. There was a smudge of dark between the eyes around the upper nape. The under-wing is relatively dark in the outer wing and lighter on the inner wing. There were no light windows in the dark area of the outer wings.
    The many Franklin’s gulls and ring-billed gulls were easily observed in close proximity to the LAGU as it flew around the raft and along the shoreline. I have included Franklin’s and Ring-billed gulls in a similar cycle under there species so comparisons can be seen within the checklist.

  6. Number observed: 2500

    Details: We conservatively estimated 1250 on the water and saw at least that many in the air. It was an amazing sight.

  7. Number observed: 100
  8. Number observed: 1
  9. Number observed: 150
  10. Number observed: 40
  11. Number observed: 1
  12. Number observed: 1
  13. Number observed: 1
  14. Number observed: 1
  15. Number observed: 1
  16. Number observed: 1
  17. Number observed: 3
  18. Number observed: 1
  19. Number observed: 1
  20. Number observed: 1
  21. Number observed: 1
  22. Number observed: 1
  23. Number observed: 1
  24. Number observed: 3
Media powered by Macaulay Library