英文關鍵字
animal
autumn
back
background
beautiful
bird
blue
cant
common
duck
environment
fauna
feather
flight
flock
fly
formation
fowl
gaggle
geese
graceful
group
lake
leader
migrate
migrating
migration
migratory
motion
natural
nature
outdoor
pond
season
silhouette
sky
slow
south
spring
swan
travel
tundra
waterfowl
wedge
white
wild
wildlife
wing
winter