英文關鍵字
animal
are
background
beak
beautiful
beds
behavior
behaviour
billed
bird
black
busy
cold
cygnus
dance
day
duck
eat
feast
feather
feathers
feed
feeding
food
forage
frenzy
frost
gathering
group
lake
landscape
light
looping
majestic
mirror
muddy
natural
nature
olor
outdoor
peck
pick
pond
pool
puddle
reed
reflection
reflects
scavenge
sea
seamless
season
swan
swans
swoon
them
thrown
water
waterfowl
waters
white
wild
wildlife
wing
winter
winters