Question

why doesn't crow get a shock when it stands on a high voltage wire?

Answer 1

The wires, on which we see the birds sitting, do have a very high potential. But, only high potential cannot cause flow of current. So, when a bird is sitting on such a wire, its whole body is at a high potential, but due to the absence of a lower potential, the current cannot flow. We will also not get any shock if suppose we are hanging by that wire. But, we will get a heavy shock as soon as our feet will touch the ground, since it will provide the necessary lower potential.

Answer 2

Crow doesn't get shock when it stands on high voltage wire because crow touches only one wire which its sit and the wire is always farr away from another face or wire since there is no connection of crow from ground so crow is prevented from getting shock.