英文關鍵字
algae
anas
anatidae
animal
animals
anseriformes
background
bird
birds
brown
cute
drink
duck
duckling
eat
eats
environment
fauna
feed
feeds
funny
green
habitat
lake
mallard
natural
nature
outdoor
park
plants
platyrhynchos
pond
river
season
summer
surface
swim
swims
water
waterfowl
wild
wildlife
wing