英文關鍵字
animal
aquatic
background
beak
beautiful
beauty
behavior
bird
black
breeding
buccinator
character
closeup
cygnus
elegant
fauna
feather
head
lake
lovely
motion
mouth
natural
nature
neck
ornithology
outdoor
plumage
portrait
river
standing
swan
swimming
water
waterfowl
wetlands
white
whooper
wild
wilderness
wildlife
wing
wings