flying geese silhouette morning fog yellowstone

alight background biology boiling bubble canadian conservation cycle distance distant ecology feature flight flock flying foggy formation gathering geese geology geothermal goose grass grasslands green group hayden heron hills hot landscape mist morning national northern open park pattern peak pines pool rhythm rise rolling section setting shape shine silhouette silhouettes sky spring steamy stream strength sun thermal valley vast volcano wide wild wilderness wildlife winged wings wonder wyoming yellowstone