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 ...

Ornithologist Christopher Clark has a car full of gear to unload: cameras, sound equipment ... Inside that tunnel sits a male Anna’s hummingbird, watched from above by a panopticon of eight ...

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.