a blue heron fishing in prime hook national wildlife refuge in milton delaware.

wildlife bird wetland reflection waterbird water nature beak pond waterfowl swamp shorebird marsh heron wing blue fishing prime hook national refuge milton delaware sanctuary birds bay habitats freshwater salt marshes grasslands ponds species beach marine estuary catching fish nwr sun autumn grass wading habitat saltwater swamps flooded adaptable fishbearing herons flying nest isolated aviary incubate nestling roost rookery feather egg fly marshland lowlying wet tide waterlogged coastline coast monocotyledons grasses cattails bog slough park ecosystem wilderness vegetation bosk green chesapeake