英文關鍵字
animal
beak
bird
brown
climate
clip
color
duck
ducks
duckweed
eats
ecology
environment
feather
feed
female
few
flying
footage
full
green
head
lake
lilies
mallard
motion
move
movement
moving
nature
neck
nobody
outdoor
outdoors
plant
pond
reflection
river
sunny
swim
swimming
tail
video
water
wave
weather
wild
wildlife
wings