|Sorry about that. I'll go away quietly now.|
His scientific name, Nycticorax nycticorax, translates as "Night raven night raven"; repeated twice, emphasizing that he really, really appreciates being left to sleep in the daytime. He works the night shift, hunting the same grounds as our great blue herons do in daylight, catching frogs, fish, crustaceans and other small animals.
He's not a raven, but got the name, doubled, because his call is like a crow's. Listen to it here. (Cornell "All about Birds")
From Cornell's "Cool Facts":
Young Black-crowned Night-Herons often disgorge their stomach contents when disturbed. This habit makes it easy to study its diet. ...
Adult Black-crowned Night-Herons apparently do not distinguish between their own young and those from other nests, and will brood chicks not their own.