The rest of their plumage is all black. It described them as "very sociable" birds that build their nests close to each other. Some established rookeries are known to have been in use at the same ...

SALT LAKE CITY (ABC4) — Bird enthusiasts ... DWR said that great blue herons nest yearly in a rookery near their George S. And Dolores Eccles Wildlife Education Center. Herons mostly feed ...