1) Aquatic nesting area 2) Nesting area for wading birds 3) Rookery 
A heronry, sometimes called a heron rookery, is a breeding ground for herons. ==Notable heronries== Some of the notable heronries are: === Asia === === Europe === === North America === ...
• (n.) A place where herons breed.
(from the article `heron`) ...and swamps, catching frogs, fishes, and other aquatic animals. They nest in rough platforms of sticks constructed in bushes or trees near water; ...
Her'on·ry noun A place where herons breed. 
[n] - a breeding ground for herons
Where colonies of herons, egrets, and ibises nest as a group.
noun a breeding ground for herons; a heron rookery
Colonial breeding site of herons or egrets; sometimes applied to other colonially breeding waterbirds (e.g. ibises).