 They are relatively inactive during the winter, spending some of the time in torpor, but probably do not migrate any significant distance.The echolocation calls of Yuma myotis are frequency modulated and sweep abruptly from 59 to 72 kHz down to 45 to 50 kHz.Yuma myotis typically undergo a polygynandrous mating system, where a female pairs with several males, each of which also pairs with several different females.