An intriguing question, my friend! How can these flying, little beings chill out on a live, electric wire and still live to tell the tale? Shouldn’t they become fried instantly? As always, there is a little bit of science behind it, and surprisingly… it has something to do with electricity…
When a bird lands on a power line its body acquires the same amount of voltage (or electricity if you prefer that) as the electric wire he’s resting on. Fair enough, but you might think that’s game over for the bird. Of course it isn’t.
To be able to call himself officially fried he has to complete the electric circuit. If he were to stretch his wings and accidentally touch something of a different voltage, like another wire for instance (or any other grounded object), he could then call it a day. Because the electric circuit would then be complete.
The power would go through the bird and on to the other wire roasting him alive. But when he sits still on the power line the voltage has nowhere to go. It simply ignores the bird.
So he and his bird friends can live happily ever after, as long as they don’t screw it up by being to clumsy.