Chimney Swift

Chaetura pelagica

It nests in chimneys instead of hollow trees, and 'swift' is how it flies. Its scientific name, Chaetura, means 'bristle-tailed,' for the spiny tail tips it uses to cling to walls.

Chaetura is Greek for 'bristle-tailed'; pelagica means 'of the sea,' probably for its wandering life.