英文關鍵字
animal
beaver
big
brown
canal
coypu
cute
dark
environment
europe
fauna
fur
gnawer
habitat
herbivorous
hold
introduced
invasive
lake
mammal
marshes
muzzle
myocastor
natural
nature
nutria
orange
outdoor
park
paw
pest
plant
pond
rat
river
rodent
semiaquatic
spring
steam
swamp
swim
swimming
tail
teeth
tranquil
vegetation
water
wetland
wild