1) Bird genus 2) Genus nycticorax 3) Old world night herons 
Nycticorax is a genus of night herons. The name Nycticorax derives from the Greek for `night raven` and refers to the largely nocturnal feeding habits of this group of birds, and the croaking crow-like call of the best known species, the Black-crowned night heron. These are medium-sized herons which often are migratory in the colder parts of the.....
[n] - Old World night herons
genus Nycticorax noun Old World night herons