abstract
air
animal
avian
background
bevy
birds
birdwatching
black
blackbirds
cloud
cluster
colony
crow
crowd
duck
environment
fauna
flight
flock
flock of bird
fly
flying
formation
free
freedom
group
life
lot
many
midair
migration
multitude
nature
ornithology
pigeon
ravens
seasonal
silhouette
sky
soar
soaring
starling
swarm
team
wild
wildlife
wind
wing