The 14th Annual Kern River Valley Hummingbird Celebration is August 11, 2012. It is a a free no host even at Kern River Preserve. (It is suggested you make a $10 donation per adult to help defray the cost of feeding all of the birds at the Kern River Preserve.) It includes bird walks, bird feeding workshops, and an information booth. It is described as a “very low key event”.
It is possible to see six species of hummingbirds including Black-chinned (numbers decrease from July through early September), Anna’s, Costa’s (low numbers), Calliope (rarely), Rufous (peak numbers in late August and early September), and Allen’s (virtually impossible to separate from Rufous).
For more information go to: http://www.birdwatchingdaily.com/events.aspx?page=info&eventid=153 and http://kern.audubon.org/hummer_fest.htm