A rookery is a colony of 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. [6]