The Eastern Barred Bandicoot, Perameles gunnii, is a small endangered species in Australia. It has one of the shortest gestation periods (pregnancy) of all mammals — it gives birth after only 12 to 13 days! This fun video from an Australian zoo will tell you more, as will the links below it (more pics, too!).

Wildscreen ARKive
Werribee Zoo (Australia)

Eastern Barred Bandicoot