Siberian roe deer
Roe deer can jump distances up to , and mating occurs in August and September, and female roe deer are the only ungulates to undergo embryonic diapause. Embryonic implantation takes place in January and gestation lasts 280–300 days. Females usually have two young at a time, which are weaned after 4–5 months. Females reach sexual maturity in their first year of age but usually do not breed until their second. Males usually mate in their third year of life. The life-span the Siberian roe deer does not usually exceed 10 years.