as identified by the Audubon Society's
Field Guide to North American Birds

This species and the Bronzed Cowbird are the only North American
songbirds that are brood parasites, laying their eggs in the nests of
other birds and leaving them to the care of foster parents.

Out of the imagination.
Out of the brooding brain.
Out of the urban nest, lined in desires scaveng'd from
   American soil,
                woven in thorniest tree.
Out of instinct springen strange birds, strange birds
   though common,
                foster birds,
                siren birds, their songs ruinous.
Out of neglect and knowledge of neglect, and the outward
   show of caring
                they comen, seeking survival.