Myotis federatus is a vespertilionid bat recorded from the Malay Peninsula. It has forest records, but the available assessment describes only a small number of known specimens.
Its fur is uniformly dark brown and usually lacks pale tips. The ears are moderately large and narrow; the forward-leaning tragus reaches about halfway up the ear.
It has records from forest environments; the IUCN assessment includes tropical and subtropical moist lowland forest among its habitats.
An extinction-risk assessment has not been added yet.