Third-person singular simple present indicative form of make head or tail of

A South American duck of freshwater habitats, Heteronetta atricapilla, known for laying its eggs in the nests of other ducks.

plural of black-headed duck

(informal, figuratively) Very easily.

present participle of stand on one's head

The North American bald eagle.

plural of white-headed eagle

To celebrate the birth of a baby by drinking alcohol.

Poecile cinctus, a small bird of the tit family Paridae

Oxyura leucocephala, an arctic sea bird in the family Anatidae