Birds in the sky.
The bird are flying.
The birds are in the air.
The birds are together.
The sun is shining.
many birds in the air
A sky full of birds
A cloudy sky full of birds
A  sunny sky full of birds
A large group of birds in the sky
Many birds flying through the air
I large group of black birds with white undersides
Many black and white birds in flight
Many birds with white undersides and black wings
a large flock of birds flying under a blue cloudy sky