types:
Turdidae,
family Turdidae
thrushes; in some classifications considered a subfamily (Turdinae) of the family Muscicapidae
Sylviidae,
family Sylviidae
in some classifications considered a subfamily (Sylviinae) of the family Muscicapidae: Old World (true) warblers; American kinglets and gnatcatchers
Mimidae,
family Mimidae
sometimes considered a subfamily of Troglodytidae: mockingbirds; catbirds; thrashers
Anatidae,
family Anatidae
swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks
Alcidae,
family Alcidae
web-footed diving seabirds of northern seas: auks; puffins; guillemots; murres; etc.