How are birds the same as bats?

Birds and bats are both animals, but they are very different from each other. Birds are vertebrates that have feathers, wings, and beaks. Bats are mammals that have fur, wings, and teeth. Birds lay eggs, while bats give birth to live young. Birds have a four-chambered heart, while bats have a three-chambered heart. Birds have a higher body temperature than bats. Birds can fly, while bats can only glide.