英文關鍵字
39aph39
aerial
air
altitude
arrival
avian
behavior
bird
birdlife
birds
circling
conservation
currents
cycle
dance
display
ecosystem
enthusiasts
environmental
event
flight
flock
gliding
high
large
migrating
migration
migratory
natural
nature
ornithological
ornithology
pattern
phenomenon
postmigration
return
rhythm
route
seasonal
sky
soaring
sojourners
species
spectacle
spring
stork
storks
thermals
video
warm
watching
wildlife