More information: Fernando Gual-Suárez et al, Ultraviolet-induced photoluminescent bristles on the feet of the Mexican free-tailed bat (Tadarida brasiliensis), Mammalian Biology (2024). DOI: 10. ...

But as babies, bats are all about their giant clown feet. Most mammals exit the womb with hind limbs that measure only about 20 to 60 percent of their maximum size.