英文關鍵字
anatidae
animal
arctic
avian
background
barnacle
bird
birds
black
branta
clean
coast
environment
fauna
feathers
ferruginea
field
geese
goose
grass
heavy
lake
leucopsis
nature
ornithology
outdoor
pouring
rain
ruddy
shelduck
shore
single
summer
swims
tadorna
two
water
white
wild