英文關鍵字
adult
animal
barn
beautiful
behavior
bird
birding
birds
camera
close
closeup
eaves
ethology
europe
european
feed
flight
fly
food
garden
high
hirundo
hole
home
house
leave
male
motion
mud
nature
nest
nestling
observation
ornithology
patio
resolution
roof
rustica
slow
swallow
trail
urban
wall
watching
wild
wildlife
wings