英文關鍵字
migratory
animal
autumn
beautiful
bird
birds
flock
nature
sky
wild
animals
blue
flight
formation
group
isolated
migration
wildlife
wings
background
cranes
fly
free
freedom
high
key
outdoor
travel
action
behavior
fall
flapping
flying
geese
goose
graceful
motion
video
waterfowl
air
beauty