Asked by: Anonymous
Probably the Tailless Tenrec (Tenrec ecaudatus) of Madagascar, although it depends how you measure it. Mammals can have very variable litter sizes, but as a rule, the maximum litter size is the number of nipples, and the average litter size about half that. In their native Madagascar, Tailless Tenrecs (21-29 nipples) have litters of roughly 15 on average, with up to 32 reported in the wild. The naked mole-rat would be another contender, with one litter of 33 reported.