Mexican free-tailed bats can find their food in total darkness. Once a bat finds pret, it speeds up the number of beeps, until it zeros in on the catch. The bats learn to read these echoes to know what's around them. For instance, a tree send back a different echo than a moving insect. Each female gives birth to one baby, called a pup.
Mothers give birth while clinging to the roost with both thumbs and feet.
The pup remains attached its mother by the umbilical cord for up to one hour. As soon as the baby is born, the mother carefully cleans and nurses it. The pup remains attached to the mothers by the umbilical cord up to one hour, allowing mother and pup time to learn one another's voice and scent before separating. She nurses her pup from pectoral mammary glands, similar to humans'. Usually she feeds her pup before she goes out to feed and again upon her return.