英文關鍵字
america
animal
baby
beak
bird
birds
black
branta
canada
canadensis
canadian
duck
ducks
feather
feathers
flight
fowl
geese
goose
gosling
grass
hunting
lake
landscape
migration
nature
north
pond
river
spring
states
summer
swimming
united
water
waterfowl
white
wild
wildlife
winter