I was interested about the Anna's hummingbird 'singing' with its tail.
Here is an article about that:
Anna's Hummingbird Chirps With Its Tail During Display Dives
This from another story about the dive:
As they come out of their dive, they emit a short "chirping" sound which was recently shown by Dr Clark to come from its tail feathers rather than a "song box" in its throat. It does this by exploiting the noise generated as air rushed through the vanes of its tail feathers at the end of a dive, similar to the sound produced by air moving over the vibrating reed of a clarinet. "This is a new mechanism for sound production in birds," Dr Clark said.
Hubby was just telling me that hummingbirds are among a small number of birds that can’t walk. They surely make up for it in flying.