英文關鍵字
gray
pigeons
swarm
feet
man
city
square
video
sec
survival
wild
birds
urban
environment
doves
are
begging
wing
pigeon
dove
bird
men
coexistence
life
interaction
ecology
feeding
scavenging
human-animal
conservation
habitats
observation
behavior
cohabitation
ecosystem
population
wildlife
crowd
hungry
adaptation
animal
sunny
biodiversity
walk
group
grey
street
birdwatching
flock
food
flight
eat
fly