Date: 5/5/25 5:04 pm From: Joe Morlan via groups.io <jmorlan...> Subject: Re: [EBB-Sightings] Mount Diablo Big Day Hike results
This is an irruptive species with incursions into Northern California correlated with drought in Southern California. I recall back in the early 1970's they moved into Tilden Park one year.
More information here...
"Irruptive movements of the Black-chinned Sparrow (Spizella atrogularis) in response to variations in precipitation: Implications for climate change resiliency" by Pandolfino, Douglas & Ray. (Western Wildlife 9:24–37, 2022)
On Mon, 5 May 2025 16:30:00 -0700, "Bruce Mast via groups.io" <cathrasher4...> wrote:
>More generally, it would be gratifying to have breeding Black-chinned >Sparrows in the East Bay again. I read Grinnell's reports about >Black-Chinned breeding in places like Claremont Canyon and wonder what it >would take to bring them back. I suspect a change in fire management >practices would be required. -- Joseph Morlan, Pacifica, CA
