I'd be very interested in theories to explain this spring's dramatic Cassin's Finch invasion of the lower elevations of the Front Range. We usually get these prolific snow storms in March and April, but my 24 years of personal records don't show anything previously like this year's Cassin's Finch invasion. (Of course, 24 years is a tiny data window for a species that probably predates humans...)
Are cone crops in the high country poor this year? Are the finches coming from northern latitudes? Was last year a banner breeding year? Why is the weather disproportionately affecting this particular high-elevation finch species? I don't have any answers myself, but hope that others might. Cheers, Richard Trinkner Boulder -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/CAG_%3D4zc1kz4D%3DMSaYO6qh48508GPSihNWuD8TM8S6C3-DeLbQA%40mail.gmail.com.
