英文關鍵字
anatidae
animal
back
beauty
behavior
bird
care
carrying
cute
cygnet
elegance
family
feathers
female
freshwater
hair
horizontal
lake
large
love
loyalty
majestic
male
mammal
monogamous
mute
pond
protection
reflection
riding
river
small
swan
swimming
watch
water
white
wildlife
wing
young