英文關鍵字
action
bird
birds
buccinator
cambridge
canada
cygnet
cygnets
cygnus
fall
falling
familty
family
feeding
fowl
gosling
grand
lined
nature
offspring
ontario
outside
overcast
pair
path
river
snow
snowing
snowstorm
snowy
storm
surface
swan
swans
swimming
trail
tree
trumpeter
tumpeter
water
waterfowl
wild
wildlife
windy
yearling
young