Re: Possible Black-tailed Gull Lake Merced Boathouse
Petertoggle quoted messageShow quoted text
Hey there. I am confused here, to me this bird looks like a perfectly
normal California Gull except for the bill. The bill is deformed, and apart
from the shape, one telltale feature that it is deformed is that mealy look
to the color of the bill. Often deformed gulls have this mealy bill color. I
am not sure why, but it is pretty consistent.
The tail looks normal to me as well. This is a juvenal tail, and does
not look odd for a worn juv. Tail to me. Back darkness looks normal as well.
From: SFBirds@groups.io <SFBirds@groups.io> On Behalf Of Peter Pyle
Sent: Saturday, May 4, 2019 8:16 PM
To: Alvaro Jaramillo <chucao@...>
Subject: Re: [SFBirds] Possible Black-tailed Gull Lake Merced Boathouse
I've done some research and can't find close matches with second-cycle
Black-tailed so will re-identify it in eBird as Gull sp.
The back still looks dark to me for CAGU and I'd like to find one with a
tail pattern like this bird has. Both species at this age are of course
extremely variable, which makes it but fun and a challenge.
Comments on specific identification criteria, pro and con, still welcomed.
At 07:48 PM 5/4/2019, Alvaro Jaramillo wrote: