flock of snow geese chen caerulescens flying in a formation

flock sky formation flight waterfowl blue bird nature birds wildlife flying goose horizontal wild animals environment vformation migrating outdoors geese fly cloud snow white caerulescens fowl migration chen glide aquatic birdwatching avian ornithology beak natural outside feather canada canadian tidal salt marshes photograph group color rivire beaudette north america marsh ontario birding wing