GGAS First Friday Bird Walk, May 5, 2017 Tilden Nature Area

Alan Kaplan


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:

Wild Turkey  
Turkey Vulture 
Red-shouldered Hawk  
Red-tailed Hawk 
Anna's Hummingbird       on nest
Hairy Woodpecker  
Northern Flicker  
Pacific-slope Flycatcher  
Hutton's Vireo  
Warbling Vireo 
California Scrub-Jay  
Common Raven 
Tree Swallow  
Violet-green Swallow  
Chestnut-backed Chickadee  
Red-breasted Nuthatch  
Pygmy Nuthatch 
House Wren  
Pacific Wren 
Bewick's Wren      wren hat trick!
Swainson's Thrush    First of Season for many observers
American Robin  
Orange-crowned Warbler  
Wilson's Warbler 
Dark-eyed Junco  
Song Sparrow  
California Towhee  
Spotted Towhee  
Black-headed Grosbeak 
Purple Finch 

Best of Boids!

Alan Kaplan

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Alan Kaplan

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