To which family of birds does the one on the picture belong?

The boat-billed heron, colloquially known as the boatbill, is a member of the heron family, and was formerly thought to be in a monotypic family, Cochlearidae. It lives in mangrove swamps from Mexico south to Peru and Brazil. It is a nocturnal bird, and breeds semi-colonially in mangrove trees, laying 2–4 bluish white eggs in a twig nest.