英文關鍵字
barn
bird
birdwatching
calling
close
colorado
footage
hirundo
migrant
migration
nature
ornithology
outdoors
passerina
passerine
rustica
singing
song
songbird
spring
swallow
vocal
wildlife
英文關鍵字
barn
bird
birdwatching
calling
close
colorado
footage
hirundo
migrant
migration
nature
ornithology
outdoors
passerina
passerine
rustica
singing
song
songbird
spring
swallow
vocal
wildlife