GGAS First Friday Bird Walk, May 5, 2017 Tilden Nature Area
Tilden Nature Area, Contra Costa, California, US
May 5, 2017 8:30 AM - 11:30 AM
Golden Gate Audubon Society First Friday Walk, May 5, 2017.
We met at the Tilden Nature Area parking lot and walked to Jewel Lake on the road and Boardwalk, with a detour on the service road to see an Anna's Hummingbird nest in a California Bay tree. FOS Swainson's Thrush for many today.
Theme was syrinx and brain. See Cornell Laboratory of Ornithology's third edition of Handbook of Bird Biology for details. The non-Passerine birds who show vocal learning, the Parrots and the Hummingbirds, each have a learning system in their brains that is different from (but analogous to) the song learning system in the songbirds.
Here are the 33 species seen by the MoB (many observers) of 38 birders:
Anna's Hummingbird on nest
Bewick's Wren wren hat trick!
Swainson's Thrush First of Season for many observers
Best of Boids!
Please use my new email address from now on:
George A Suennen
As I have mentioned before, thanks for leading the group. As always a very educational experience.
I posted my photos from today's walk at:
And I say the Pacific-slope Flycatcher was the star of the show.
I did have one unidentified "black bird" located in the pine
trees behind the Education Center. I had pointed it out to
several members of the group, but because of the backlit
situation, no one could help with the identification. Photos of
this birds are the last two on the site for this walk. If someone
recognizes this bird, I'd appreciate any assistance with the id.
On 5/5/2017 10:50 PM, Alan Kaplan lnkpln67@... [EBB_Sightings] wrote: