Pack: Birdsongs of the Cenozoic by Incarnadine

A flock of geese travelling from one direction to another, honking all the while. See the picture on Flickr at ...

A single chirp from an unknown species of bird, recorded in my backyard.

A birdcall consisting of a long trill, two chirps and a two-tone chirp.

A birdcall consisting of a fast trill and three fast chirps.

This whole city is overrun with Grackles (Quiscalus mexicanus), those big black birds that poop on everything in sight. Every ...