英文關鍵字
adult
anatidae
animal
area
asia
avian
background
beach
beak
beautiful
biology
bird
black
body
brahminy
brown
clouds
cloudy
cute
distinctive
duck
ecosystem
europe
evening
feathers
ferruginea
fine
flight
foliage
fowl
grass
green
greenery
habitat
inhabited
lake
landscape
mallard
migratory
moscow
natural
nature
nice
orange
outdoors
picturesque
plumage
pond
population
portrait
pretty
public
reflection
riparian
ruddy
russia
sand
sandy
scenery
shelduck
shore
sky
small
stormy
suburbs
summer
swimming
tadorna
tail
urban
vegetation
walking
water
waterfowl
wild
wildfowl
wildlife
wings