As its common name suggests, the rusty grackle (Euphagus carolinus) is best distinguished by the rusty red-brown edges and tips to its feathers . associate degree otherwise fairly indistinctive, medium-sized bird with a slender bill, the rusty grackle is one in all the smallest amount accepted of the North yank blackbirds .
The distinctive rusty colouration of this species is exclusive to the winter animal material, wherever it's significantly noticeable on the upperparts of the body . throughout the winter, the male rusty grackle is defined by the rusty edges to the tertials, and by its rusty brown crown, back end and back. the remainder of the upperparts ar black, whereas the cheeks, throat, breast and sides ar lighter brown or buff . The male conjointly includes a tawny-coloured stripe on top of the attention. the feminine rusty grackle is analogous to the male, however with a conspicuous paler buff line on top of the attention .
In breeding animal material, the rusty colouring of this blackbird becomes less apparent, with the male changing into usually uniform dark black on top of, typically with a shiny blue-green to chromatic gloss . the feminine is mostly associate degree modest grey-brown, though darker on top of, conjointly with a small blue-green gloss
Both the male and feminine rusty grackle possess putting yellow eyes and an extended, square-tipped tail. The juvenile rusty grackle resembles the adult, however is often abundant browner and includes a paler line on top of the attention. the attention of the juvenile bird is ab initio brown, changing into yellow in its 1st time of year
The male rusty grackle includes a screaky, effervescent song, comprising up to a few warbled notes ending in an exceedingly higher, rising note, that is ably likened to a rusty gate creaking. the decision of the rusty grackle is typically a harsh ‘chek’