They are typically found in and around shallow water, generally along watercourses and shorelines, and usually in locations having roost trees nearby. They may occur in inland fresh waters, along estuaries or in marine habitats. Generally, Grey Herons feed most actively at dawn and at dusk and roost – usually in trees – during the middle of the day and at night. But Grey Herons also feed at night, particularly during breeding when adults have to feed up to 23 hours a day to care for the young .
I took this photo late one night.