Why do birds not get electrocuted when they sit on telegraph poles?

Birds do not get electrocuted when they sit on telegraph poles because they do not complete the electrical circuit. The bird's body is not a good conductor of electricity, so when it touches the live wire, the electricity does not flow through the bird's body. Instead, it flows through the bird's feet, which are covered in scales that act as insulators. The electricity then flows through the telegraph pole and back to the power source.