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.
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.
Birds perching on power lines do not get electrocuted because they are not completing a circuit by touching another conductor. The power lines are insulated and the birds' legs are not close enough together to create a path for electricity to flow through their bodies.
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
Birds sit on a nest. It begins with the letter n.
Railway tracks electrical lines
Birds Sit on their eggs to keep them warm, and to hide and protect them from predetors.
The electrical lines to a typical house in the UK are 230 V 50 Hz.