The Great Blue Heron is a locally common statewide breeder. Breeding habitat usually consists of isolated stands of trees (living or dead) on islands or in undisturbed open areas near water. This species has increased noticeably during the past twenty years. BCN trends show declines, but marshlands and heron rookeries are poorly monitored by the BCN Survey. Data we have collected from Lake Renwick and other heron rookeries shows a more substantial annual increase. Photo: © Eric Secker