three dark brown pelicans flap asynchronously showing motion in flight

2021 american animals aquatic are asynchronously august aves aviation bill black blue care carnivores cloudy coastal conservation dark decline department ecology ecosystem elwa elwha environment family feathers feeding fish flap flight fly forks group gular high hunters identification long management marine monitor monitoring motion movement niche north occidentalis ocean outlined pale pelecaniformes pelecanus pelicans pelicanus population predators recovery river salmon sanctuary sea seashore shoreline showing sky small soaring species state stony three travel washington water wild wings