hooded mergansers running on water

avian background biology bird birding birds circadian colorful conservation cycle distance ecology feathered female flap flight flock flocking flying formation gamebirds gathering group habit hood hooded klamath lake legend lower male marsh marshes merganser migrate migrates migration migratory mountain national ornithology pair pattern reeds reflection refuge rewilding rhythm run running season seasonal shape shorebirds sky soar strength swamp teamwork tule tules vast waterfowl wetland wetlands wild wildlife wings wonder