There is a board game from the 90's called 'Mind Trap' in which players must solve tough riddles. One of the riddles goes like this:
Sid Shady claimed that he developed a special insulation for high powered electrical lines. He said the insulation is guaranteed to save thousands of birds who unwittingly land on the lines and are electrocuted each year. [..] What was wrong with Shady's claim?
The solution was:
High powered electrical lines have such a strong magnetic field that is virtually impossible for birds to land on them. The magnetic field will actually repel the birds.
That sounds like hogwash to me. However, over the past few years I've noticed I have never once seen a bird sitting on a high-voltage power-line.
So, are birds really magnetically repelled by high-voltage power lines?
Someone here asked the same question, and the consensus seemed to be that birds don't land on the wires because "a bird's sense of direction is governed by magnetic fields."
However, note that they also concluded that the birds wouldn't be shocked by the wires because they're not grounded, which I'm fairly certain is incorrect.