Date: 10/27/19 11:39 am From: Caleb Centanni <caleb...> Subject: [obol] Grants Pass Costa's Hummer is a hybrid
Courtney and I watched the hummingbird with basically perfect Costa's plumage and callnotes in Grant's Pass this morning, to our dismay, sing a perfect Anna's Hummingbird song. Notes (and later tonight recordings) here:
The bird does have slightly short gorget corners and perhaps a slightly long tail, but considering that we and several eBird reviewers called it pure Costa's based on plumage, this raises some serious questions about whether non-singing Costa's Hummingbirds in Oregon can be identified to species. Is there any chance it could be imitating the Anna's song? This seems unlikely, since hummingbirds are non-passerines.