The Studies on Ecology in Hylobates leucogenys

The ecological characteristics of Hylobates leucogenys distributed only in the Nature Sancturay of Meng La,Yunnan Province (21°08′-22°00′N;101°15′101°50′E).Were investigated from 1983 to 1988.The total number of gibbons were less 40.The most individual number of group was 5 while least one was 2.The habitate of the gibbon situate at the altitude 700-1,000 M.This gibbon feeds chiefly on plants that occurred 90.6% of the total food specimens,and eat also small animals that occurred 9.4% of the whole food specimens.The time of feeding peak was at 8:00-10:00 a.m.The fruites were the most preference food of the gibbon following by leaves,buds,flowers and animals.The gibbons spend 38.62%,35.52%,17.29%,4.67% and 3.89% of daily feeding time on those food categories respectively.Daily activity time was about 9.5 hours.Feeding,travel and rest time occur 41.2%,13.1% and 45.7% of daily activity time respectively.Daily range was 1305 M.(1024-1586).