by the stream and treetops, gracupica nigricollis sings in flight.

bird birds birdwatching catching chicks diving duck ecological ecology egret endangered environment feather feathers feeding fish fishing flight flower food foraging freshwater garden gracupica grass green habitat hunting incubation lake lakes landing long migration migratory mudflats natural nesting nests nigricollis pecking plankton pond predation river rivers rock roosting schools season shoreline silhouette sings slender soaring soil stream structure tree treetops undefined wall water waterbirds waterway wetlands wildlife wings wingspan yard