Paridae

The tits, chickadees, and titmice constitute the Paridae, a family of small passerine birds which occur mainly in the Northern Hemisphere and Africa. Many were formerly classified in the genus Parus.

Eurasian and African members of this family are referred to as "tits", while North American species are called either "chickadees" (onomatopoeic, derived from their distinctive "chick-a dee dee dee" alarm call) or "titmouses", the latter being an older name that was used for all tits. The name titmouse is recorded from the 14th century, composed of the Old English name for the bird, mase (Proto-Germanic *maison, Dutch mees, German Meise), and tit, denoting something small. The former spelling, "titmose", was influenced by mouse in the 16th century. Emigrants to New Zealand presumably identified some of the superficially similar birds of the genus Petroica of the family Petroicidae, the Australian robins, as members of the tit family, giving them the title tomtit, although, in fact, they are not related.