Both birds and bats can be electrocuted if they come into contact with power lines. However, bats may be more prone to electrocution because of their habits and anatomy.
Birds typically sit on power lines with their feet, and their bodies are not in contact with the ground or any other conductor. This means that there is no complete circuit for the electricity to flow through, and the bird is safe. Bats, on the other hand, often hang upside down from power lines or other structures using their feet. If a bat touches a power line with its feet and its wings or body happen to touch a second wire or the ground, it will create a complete circuit for the electricity to flow through. This can cause the bat to be electrocuted.
Additionally, bats are more sensitive to electrical fields than birds. Their brains have evolved to be able to detect and navigate using electric fields, which they do when hunting insects at night. This sensitivity may make them more susceptible to the effects of electricity.
It's important to note that both birds and bats can be electrocuted if they come into contact with power lines, but the circumstances under which this can happen may be different. It's important to be aware of the potential hazards that power lines can pose to both birds and bats, and to take steps to minimize the risk of electrocution.