英文關鍵字
ambient
audio
avian
aviary
beak
bill
bird
birds
concrete
dark
dove
doves
environment
feather
feathers
flight
food
gray
grey
light
line
lines
long
longer
look
mp4
nature
pattern
patterns
pavement
pest
pests
pigeon
pigeons
plumage
road
roads
scavenge
scavenger
short
singapore
sound
sounds
tail
tropical
tropics
video
walk
walking
walkway
wing
wings
zebra
H5N1
H1N1
influenza
flu