Birds do not cast shadows when flying high?

Planes can and will cast shadows when close to the ground. Birds need to be far closer, but they still can cast shadows. But to make proper shadows, the object needs to have an angular size close to or larger than that of the sun- it needs to block out the sun. read more

Birds flying up in the sky do not cast their shadow because the source of light (sun) is too large compared to the object (bird) and the umbra of the shadow formed on the screen (ground) is very small, negligible.So it is tough to see its shadow on the ground. (P.S. read more

If the bird is flying too high, the shadow will not reach the ground. If the bird is flying over the clouds, the shadow will only be cast on the top of the cloud instead of the ground. read more

Birds flying up in the sky do not cast their shadow because the source of light (sun) is too large compared to the object (bird) and the umbra of the. read more