英文關鍵字
anas
anatidae
animal
anseriformes
autumn
beak
bill
bird
close
defoliation
duck
environment
falling
fauna
female
foliage
fowl
gray
hunting
lake
leaves
mallard
nature
near
ornithology
outdoors
park
parkland
platyrhynchos
plumage
pond
profile
shore
single
small
water
waterfowl
wild
wildlife
wing