Mating Behavior of Hoolock Gibbon(Hoolock hoolock)in the Field:A Case Study at Mt. Gaoligong, Yunnan, China
This is the first report on mating behavior of Hoolock gibbon in the field from China. Mating behavior of a pair of adult Hoolock gibbons were observed four times at Mt. Gaoligong in one day (on April 16 th,2008). Mating patterns of the Hoolock gibbon could be divided into four steps: the female raised buttocks to invite mating, the male approached to the female and accepted the request, mounting, and resting. There were some differences on invitation for mounting between wild and capturedstate Hoolock gibbon, and the wild female was dominating when mating. The mating fastigium of animals and interference by the human may be the main reasons causing multiple mating activities of Hoolock gibbon in a day.