From my CCDS page. The source is a nascent/wannabe/lesser-known meme called "the bird" or "bird.jpg" Sterling Crispin did the first painted version.
This bird image has some internet juice, mostly as an avatar. Dump.fm and Moot's former site have helped.
The bird is a Common Grackle; related to the Great-Tailed Grackle, which has a hideous call [YouTube] that sounds like the word "grackle" but with extra consonants, whistles, and sounds beyond the range of human hearing.
Hat tips GucciSoFlosy, carjackcker, frederick, melipone, maryrachel, maxlabor, arjununcle and others.