Question: How do birds sit on high-voltage lines without getting electricuted ??

Aron Kisdi answered on 12 Mar 2014:

Electricity is the movement of electrons.
Imagine electricity as a flow of water. Water flows from high points to low points. If there is a large difference in height it flows with more power (e.g.: waterfall).
Electricity flows from high-voltage, to low-voltage, ground can be considered zero voltage, same what the ocean would be for water.

You only get hurt if you are in the path of water, and it needs to flow through you to get to the lower ground, e.g.: standing in a waterfall.

Same with electricity you only get hurt if you connect high-voltage to ground. But birds are not touching ground so electricity doesn’t flow through them, it keeps following through the wire which is like a river.

SAFETY FIRST! Never touch a wire that might be live, even if you think you are insulated from ground.

For extra points: In fact there will be a small voltage difference between the feet of the bird, however it is very small and won’t hurt the bird.