英文關鍵字
1080p
1920x1080
animal
bird
birdcall
birds
black
branch
branches
caw
cloud
clouds
crow
crows
dark
environment
flight
flock
forest
fullhd
gray
grey
natural
nature
nest
nests
outdoor
outdoors
raven
ravens
rook
rooks
silhouette
silhouettes
singing
sky
song
squawk
tree
trees
white
wild