英文關鍵字
animal
beak
beautiful
bird
city
cold
cool
duck
environment
europe
fauna
feather
feathers
frost
ice
lake
landscape
mallard
natural
nature
ornithology
outdoors
park
plumage
pond
river
season
snow
snowing
snowy
swim
water
waterbird
waterfowl
white
wild
wildlife
winter
wintering