Size

10-12 cm

Weight

2-3 grams (birth), 38-46 grams (adult)

Body temperature

97-100F

Heart rate

280-412 beats per minute

Respiratory rate

74 average

Toes front

4

Toes rear

5

Adult Food consumption

10-15 grams per day

Adult water consumption

11-13 ml per day

Female mammae

8

Chromosomes

22

Gestation period

21 days

Lifespan

2-2.5 years although over 4 years has been known