Common Nighthawk

Chordeiles minor

Misleading: it isn't a hawk, it's a nightjar. Its scientific name, Chordeiles, may mean 'evening dance,' for its twisting flight at dusk.

Chordeiles combines the Greek for 'evening' with a word that may mean 'dance' or 'chord'; minor means 'smaller.' Its relatives are called Caprimulgus, 'goat-milker,' from a story told by Pliny that these birds suck milk from goats.