英文關鍵字
animal
autumn
beak
beautiful
beauty
bird
bread
brood
coot
duck
duckling
ducklings
eat
environment
family
feather
feed
food
footage
green
grey
group
lake
landscape
learn
love
mallard
natural
nature
nimble
pack
pond
protection
race
river
season
small
spring
summer
swim
video
water
waterfowl
waves
wild
wildlife
young