Why do bats hang upside down? 12/8/2016 3:06:00 PM View Count 6709 Unlike birds, bats have trouble with takeoffs from the ground. Their wings are not as strong as those of birds and they cannot run fast enough to build up flight speed. Bats have an easier time flying when they start already in the air. They use their front claws on their wings to climb to a high spot and launch themselves to achieve flight.