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