sexual maturity in males is reached at 5 years and between 4 and 5 years for females of the ugandan red colobus. the gestation period is 5 to 6 months with females having their first infant between 4 and 5 years old. there is no distinct breeding season with infants being born all year round, however during the rainier months a peak in births is seen to coincide with the flush of new leaves for food.