It is, but the lif generated by its wings is strong enough to overcome that attraction.
the fabulous flying squirrel
When a bird fly too high from the surface of the earth it does not obstruct the light hence there is no formation of shadow on the earth.- Satish
slow flying bird
The birds flying in the sky do not cast their shadow on the earth because the umbra is absent and the penumbra is too large and too faint that it is not visible as the distance of the earth is very large from the bird.
Slow flying birds
No even though it can fly the Flying squirrel is not a Bird it is a Mammal.
Flying High Bird Sanctuary was created in 2002.
If the headwind is 20 miles per hour and the bird also flies at 20 mph relative to the wind then the bird will be stationary relative to the earth. However, the bird is not stationary relative to the wind.
Wren
a bird
yes
A 0.52 kg bird flying at an altitude of 550 m