英文關鍵字
aves
volando
very
large
groups
birds
flying
ebro
delta
plegadis
falcinellus
invasive
species
concept
group
slow
motion
sky
europe
asia
australia
caribbean
east
coast
united
states
nomad
common
moorito
band
emigration
immigration
plague
flock
swarm
empty
family
mud
side
view
feather
zoology
grace
curve
harmony
head
zoo
eye
horizontal
meadow
people
silhouette
vertebrate
watching
freedom
profile
hunter
safari
wet
looking
lagoon
banking
dawn
ecosystem
south
africa
wide
claw
rare
bird