Found 2 items, similar to nightbird.
English → English (WordNet) Definition: nightbird nightbird n : a person who likes to be active late at night [syn: night owl , nighthawk]
English → English (gcide) Definition: nightbird nightbird \nightbird\ n. A person who likes to be active late at night; a night owl. Syn: night owl, nighthawk. [WordNet 1.5]