two canadian geese in flight over wilderness

air avian background biology bird birds bright canadian circadian cloudy conservation cycle distance distant ecology feathered flap flight flock flocking fly flying form formation gamebirds geese goose group habit hill hills klamath lake lower marsh migrate migrates migration migratory morning move national orange ornithology pattern refuge rhythm season seasonal shape shine silhouette silhouettes sky soar soaring strength sun sunny swan teamwork tules vast waterfowl wetlands wild wildlife winged wings wonder