when an object is closer to the light source,the larger and fuzzier is the shadow.also if the object is moved away from the screen,the shadow is fuzzier.therefore the bird which is close to sun and away from the ground casts a fuzzier shadow in the atmosphere which cannot be seen
They do cast shadows.
If I understand you correctly, you are saying that a bird flying in the sky does not have a shadow. If this is the case, it is not true. Birds do have shadows. I have noticed shadows of birds flying overhead, like a hawk, for example. I believe, that for small birds, the shadows are probably so small we just don't notice them.
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. If this is a VNS student reading this for Physics research, then I'm pretty sure you're in my grade and you know who I am)
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.
Past tense: The flock of birds was flying. Present tense: The flock of birds is flying. (flock is a collective noun)
Chickens can fly , but they are low flying birds.
Birds feel colder when they are flying
Flying birds are not always larger. There are many bats bigger than many kinds of birds.
Birds Flying Away was created in 2000-01.
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Humming Birds
Noel Gallagher's High Flying Birds was created in 2010.