英文關鍵字
animal
bird
swallow
wire
background
nature
outdoor
wild
sitting
wildlife
wings
sky
line
summer
group
flock
outside
blue
fly
environment
cable
birds
silhouette
black
feather
many
beak
forest
habitat
blurred
white
togetherness
small
perching
tail
martin
green
spring
electric
day
cloud
society
sunny
movement
tiny