Blue-black Grassquit

Basic Description

The Blue-black Grassquit is a tiny acrobat that puts on a show along fencerows from Mexico to northern Argentina. Iridescent blue males pop straight up from song perches, reveal hidden white wing patches, nod their heads in midair, and then give a short, buzzy song just before returning to their perch. Bluish males and streaky brown females are common in weedy fields and open habitats, where they sometimes form flocks of up to a few hundred individuals during the nonbreeding season.