I get a weekly email newsletter from Jim Conrad, a naturalist who spends a lot of time living in Mexico. This week, he sent me a link to a video of some Melodious Blackbirds. Here is his info on the birds, I thought they were just delightful:

MELODIOUS BLACKBIRDS COOPERATIVELY SINGING

I've mentioned how Melodious Blackbirds often sing in
pairs, each bird pumping his or her body while
alternately issuing part of the loud call. From a
distance it sounds as if only one bird were calling
but when they're doing it you can clearly see how two
birds cooperate in the effort.

Having no tripod, I've pretty much given up on making
videos with my little handheld digital camera because
the images bounce around too much. However, this week
I couldn't pass up showing you how the blackbirds
serenade me each morning during breakfast. Though the
resulting image is as bouncy as ever, at least you can
see them taking turns pumping their bodies and
calling.