英文關鍵字
mature
cygnet
preening
itself
lake
swan
bird
young
animal
mute
preen
cream
brown
feathers
water
black
plumage
cygnus
olor
winter
fowl
wildlife
nature
swimming
waterfowl
eye
beak
bill
head
neck
reflection
white
英文關鍵字
mature
cygnet
preening
itself
lake
swan
bird
young
animal
mute
preen
cream
brown
feathers
water
black
plumage
cygnus
olor
winter
fowl
wildlife
nature
swimming
waterfowl
eye
beak
bill
head
neck
reflection
white