Costa’s smaller (obvious in direct comparison), and males readily identified (beware occasional hybrids, which look more like male Costa’s, sound more like Anna’s). Female/immature Costa’s ...

The male Allen’s hummingbird has warm rusty ... chip notes and aggressive rattling sounds used in confrontational situations. Learn how to identify an Anna’s hummingbird.

Hummingbirds are perhaps our best-loved birds, but there’s a lot that people don’t know about them. What kinds of ...