single white-winged black tern bird on grassy wetlands in spreing season

alone animal avian beak bialoskrzydla biebrza biebrzanski bill bird birdie black bush chlidonias color colorful conservation fly flying grassy green leaf leucopterus living marsh marshes moor national natural nature one outdoor park poland portrait reserve rybitwa season single spreing swamp swamps tail tern tourism travel wetland wetlands whitewinged wild wildlife wing wings