Bird louse Meaning, Definition & Usage

  1. noun wingless insect with mouth parts adapted for biting; mostly parasitic on birds
    biting louse; louse.

WordNet

Definitions
  1. (Zoöl.), a wingless insect of the group Mallophaga, of which the genera and species are very numerous and mostly parasitic upon birds. Bird mite (Zoöl.), a small mite (genera Dermanyssus, Dermaleichus and allies) parasitic upon birds. The species are numerous.

Webster 1913