^
However, since rooks are found in Europe and Asia and are unlike herons, and corvids do not nest in large masses in the Western world, it is more fitting to refer to birds that nest with herons as nesting in a Heronry or seabirds or other birds nesting together in trees, cliffs, or on the ground as nesting in a breeding colony.
"The Crow Family". Wild England. Archived from the original on 27 December 2012. Retrieved 24 May 2013.