Corvidae was a family of bird species that included the crow and the raven.
In 2374, while reading Seven of Nine's personal log to determine the nature of her hallucinations, Kathryn Janeway judged Seven's description of a bird she saw ("The feathers are black, wingspan approximately one half metrer. The eyes are yellow and it has a powerful triangular beak.") to be consistent with a member of the Corvidae family. (VOY: "The Raven")