英文關鍵字
air
atmosphere
beak
bird
birds
black
bright
clear
clouds
dark
darkness
disk
element
feathers
flight
flock
flutter
fly
flying
freedom
gale
group
migration
move
ornithology
outdoor
plumage
roost
shape
silhouette
sky
sun
sunny
sunset
tranquil
transparent
vivid
white
wildlife
wing
wingspan