lone bufflehead female duck swimming

avian background biology bird birding birds buffle bufflehead circadian conservation cycle distance distant ducks ecology feathered female filled flap flight flock flocking flying formation gamebirds gathering geese goose group habit klamath lake legend lower mallard marsh marshes migrate migrates migration migratory mountain national ornithology pattern reeds reflection refuge rhythm season seasonal shape shorebirds silhouette sky soar strength swamp swans teamwork tule tules vast waterfowl wetland wetlands wild wildlife winged wings wonder