I don’t know about all of them, but the local male Anna’s Hummingbird sounds like this:
I tried to catch it once before, with minimal success, but tonight the little bastard (that’s actually what I call him, he’s VERY territorial and has chased off most of the other hummingbirds) was right outside the back door and going like crazy. I never did quite see him in the video – turns out he’s in those vines along the post on the left hand side.
I sort of hate what YouTube does to the audio, overly emphasizing the base and wiping out the higher frequencies where the hummingbird’s clicking away. But to me he sounds a bit like the mouse click on my old Logitech trackball, a really rapid staccato, like you were scrolling one page at a time, really fast, through a really long document.
But I might have just been sitting at the computer for way, way too many hours.