Natural History Wanderings

Wingbeats (Albany Adult School, Golden Gate Audubon and Oakland Museum Classes; also lists of birding hotspots, and field trips): http://www.wingbeats.org/classes/classes.htm

Ohlone Audubon  Birding Classes at Castro Valley, Livermore and Pleasanton and Field Trips Classes http://ohloneaudubon.org/index.php/education/bird-watching-classes

Palo Alto Adult School: http://www.paadultschool.org/classes/birding.html

Sterling Wildlife Biology and The Yolo Basin Foundation Beginning, Intermediate/advance Birding Classes http://www.sterlingbirds.com/birding_classes__yolo_basin.html

Evening bird classes taught by Joe Morlan and endorsed by Golden Gate Audubon Society http://fog.ccsf.cc.ca.us/~jmorlan/index.htm

Marin and Sonoma Classes with Lisa Hug: http://lisahugsnorthbaybirds.com/classes/

Pt. Reyes Field Seminars:  http://www.ptreyes.org/camps-classes-programs/field-institute/class-topics/birds

Yosemite Conservancy: http://www.yosemiteconservancy.org/calendar/upcoming?tid=95

Feel free to add other classes as comments and I will add them to the list.