The dwarf hutia (Mesocapromys nana) is a small, critically endangered, rat-like mammal known only from Cuba.

[1] It gives birth to only a single offspring at a time, and is threatened by habitat loss and non-native species such as rats and mongoose.

Dwarf hutias are heavily built and chubby, almost guinea pig-like rodents with broad rounded heads.

[3] Unlike the larger litter sizes of many other rodents, the dwarf hutia gave birth to only a single offspring.

The long-tailed Cuban hutias are nocturnal and entirely arboreal and thus rarely descend from tree crowns.