Date: 10/2/26 11:50 am From: Daniel Edelstein via groups.io <danieledelstein...> Subject: [northbaybirds] Interested in more Evening Grosbeak information?
Some of you may have seen the following excellent Sylvia Wright note that highlights an illuminating YouTube talk (by UC-Davis biologist Thomas Hahn) related to the five type calls, etc. corresponding to Evening Grosbeak:
(Regards, Daniel Edelstein, Novato)
Sierra Foothills Audubon has a spectrogram-rich public talk on Evening Grosbeaks, by UC Davis biologist Thomas Hahn, on our YouTube channel.
https://www.youtube.com/watch?v=RUfNNrohqZ8&t=275s Jul 19, 2025
This public talk – “Evening Grosbeaks of the Sierra Nevada and the West” – was presented on June 25, 2025, at the monthly meeting of the Sierra Foothills Audubon Society, in Nevada City, California. About the Talk Evening Grosbeaks are showy finches of the sub-family Carduelinae—a group that includes many familiar western songbirds such as goldfinches, house finches, crossbills, rosy-finches and siskins. Their white, black and gold plumage makes them stand out at a feeder or along the gravelly side of the road as you drive into the Sierra. About the Speaker Thomas Hahn, Ph.D., is a field biologist who has been studying western finches since he was a graduate student at the University of Washington in the late 1980s and early 90s. He is a professor at University of California, Davis, in the Department of Neurology, Physiology and Behavior. His research interests include environmental regulation of avian annual cycles of behavior, physiology and morphology, and behavioral and physiological responses of birds to unpredictable environmental events. He is an authority on avian communication, especially use of heterospecific mimicry in song, and learned non-song vocalizations.
