'nightbird' definitions:

Definition of 'nightbird'

From: WordNet
noun
A person who likes to be active late at night [syn: night owl, nighthawk, nightbird]

Definition of 'nightbird'

From: GCIDE
  • nightbird \nightbird\ n. A person who likes to be active late at night; a night owl.
  • Syn: night owl, nighthawk. [WordNet 1.5]