英文關鍵字
activity
animal
background
beak
bird
black
bread
breed
brown
canadian
canard
danger
duck
ducks
eat
eco
ecology
environment
feather
float
food
forage
fowl
funny
give
goose
grazing
green
hungry
hunt
lake
leg
meal
mire
natural
nature
offal
outdoor
outdoors
park
pond
river
sea
swim
water
white
wild
wildlife
young