[Chopi Blackbirds]

Pousada Piuval, Mato Grosso, Brazil, August 2, 2010

These guys can be tricky to identify correctly, what with Shiny Cowbirds and Unicolored Blackbirds in the area. However, with a good look you can see the grooves on the lower mandible that the other two species lack. Of course, these are also blacker and without the slight bluish sheen of the cowbirds.