a royal tern in the marsh in bombay hook nwr in delaware.

royal tern atlantic coast coasts america bird species prey small fish minnows sardines anchovies shrimps crabs natural predators hunting trapping beautiful black white birds gray bright orange bills legs marsh bombay hook nwr delaware national wildlife refuge beak bill fly egg tail flock flight birdhouse feather feathers wing chick protects tidal salt mid-atlantic refuge delaware bay creek marsh freshwater impoundments habitats wildlife refuges value migratory protection conservation habitat flyway ramsar wetland research nationally birding spot attracting birders globally state