Little Egret Walking In The Wetland At Blackwater National Wildlife Refuge In Maryland, USA

little egret egret heron bird animal avian wetland walking marsh aquatic blackwater national wildlife refuge blackwater national wildlife refuge wildlife nature habitat environment behaviour forage natural behavior species shallow water white feather plumage long legs wild lake beak birdwatching ornithology river egretta migratory conservation protection grass wader wilderness fishing bill waterbird wing waterfowl swamp birding