Because to get eletrocuted there has to be a circuit for the electricity to flow through. The bird sitting on one power line is like a dead-end street electrically. With nowhere for the electricity to flow to the bird is safe. Then of course many power lines are insulated, and aren't particulary dangerous in the first place.
The wires that are on the power poles have a strong electrical potential (voltage) and a high amount of current...
However
nothing happens until the charge goes somewhere.
The simple fact is, if one of those birds touched both wires at the same time (of course it would need to be a big bird) it would be electrocuted immediately.
Birds tend to line up with the prevailing wind.
They stand in the same direction in large groups on land.
It gives them a good view of the surrounding area so they can spot food sources, and they are relatively safe from predators.
Besides, all their friends do it so it's cool.
there legs are insulators so they can stand on power lines
Animals can sit on HIGH VOLTAGE Electrical lines. It does not give any current to animals or birds unless the circuit is complete. It is essentlal to complete the electrical circuits for making any current. When bird sit on the line / conductor the only legs of birds touched single line and it does not touch the other two conductors below upper line/conducotr , which does not make circiuit complete and birds / animals does not feel current.
crows.
Unlikely at most. Just because there is many thousands of volts passing through the lines they land on, there is no grounding done and no electrical charge involved. Many birds land on the lines to see where they will feed next or gather with birds of the same species.
For a start, most telephone wires are insulated and carry little or no electricity so, apart from falling off and hurting themselves, they won't get hurt on telephone wires. Really, you should have asked about why birds don't get hurt on overhead electrical wires. The answer is fairly simple really - to get electrocuted from those wires you need to complete the circuit, in this case touch the ground, for the electricity to surge through the body. Birds only sit on the wire and do not touch the ground, so they can't be electrocuted.
High voltage electricity can kill if it passes trough your body. When birds sit on the power cable, the electrical current cannot pass trough their body because no part of their body is touching the ground or any other wire.
Because birds are not 'grounded'. This means they are NOT touching the power line AND the ground, at the SAME time.
Birds sit on a nest.
they sit
Railway tracks electrical lines
Birds sit on a nest. It begins with the letter n.
The electrical lines to a typical house in the UK are 230 V 50 Hz.
Birds Sit on their eggs to keep them warm, and to hide and protect them from predetors.