the shiny cowbird parasitizing the rufous collared sparrow

aeneus america andean animal anu azulapound beak biodiversity bird black blue bonariensis brazil brazilian brood capensis chordata chupim collared cowbird fauna feather feeding female freedom grass ground icteridae intelligent male molothrus nature parasite passeriforme passerine perched plumage rufous shiny smart songbirds south sparrow tico walking wild wildlife wing zonotrichia