Reproduction
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.
Both males and females initiate copulation. During copulation other group members sometimes harass the pair by making loud calls, lunging at or leaping around or onto the males back. The harassers are usually either adult males in intrasexual competition or juveniles if it is their mother which is copulating.
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