When you look out your window, why are you so much more likely to see a robin or a sparrow than a Kirtland’s Warbler or a California Condor? Why are some creatures commonplace and others extremely rare? Come hear Eric Dinerstein address this question and others in San Francisco on Thursday evening June 20, as part of Golden Gate Bird Alliance’s monthly Speaker Series.

Author of the new book “Kingdom of Rarities,” Eric Dinerstein is the lead scientist and vice president for conservation science at the World Wildlife Fund. His specialty areas include tropical mammals, large mammal biology, biogeography, bats, rhinos, seed dispersal, and community ecology.