Bonaparte's Gull (not Franklin's Gull) at Cayucos Creek Mouth


petra schaaf
 

UPDATE:
Yesterday's Franklin's Gull at the Cayucos Creek mouth turned out to be an adult Bonaparte's Gull in breeding plumage.

We learned that the Bonaparte's Gull has a relatively thin bill, thin white eye crescents, and lack large white tips to the primaries.

Franklin's Gulls are a bit larger than Bonaparte's with a thicker all red bill, more prominent white eye arcs, large white tips to their primaries, and a different wing pattern when in flight.

Petra Clayton,
Los Osos



Tom Graves
 

And, yesterday late afternoon/early evening, only 1st year Bonaparte’s Gull (black tail band) and maybe non-breeding adults. About 10 total.
Also one Semipalmated Plover, and 2 Short-billed Dowitchers feeding (being chased by the numerous Willets whenever they found a snack).
And a couple of Brown Pelicans looking tired at the creek mouth, not with the others out on the rocks (sick?).

From Tom Graves