英文關鍵字
amazing
animal
avian
background
beak
beautiful
beauty
bird
black
blacknecked
clean
color
cygnus
elegant
environment
exterior
fauna
feather
graceful
lake
landscape
melancoryphus
melanocoryphus
natural
nature
neck
necked
one
ornithology
outdoor
outside
park
peaceful
plumage
pond
profile
red
reflection
river
ruddy
shelduck
surface
swan
view
water
waterfowl
white
wild
wildlife
zoology