Rookery

A rookery is a colony breeding rooks, and more broadly a colony of several types of breeding animals, generally gregarious[1] birds.

[2] Coming from the nesting habits of rooks, the term is used for corvids and the breeding grounds[3] of colony-forming seabirds, marine mammals (true seals or sea lions), and even some turtles.

Rooks (northern-European and central-Asian members of the crow family) have multiple nests in prominent colonies at the tops of trees.

[4] Paleontological evidence points to the existence of rookery-like colonies in the pterosaur Pterodaustro.

[5] The term rookery was also borrowed as a name for dense slum housing in nineteenth-century cities, especially in London.