Study on Social behaviors of Wild Borneo Orangutans ; focusing on males
Report KANAMORI TOMOKO
5th March, 2007 - 31th March, 2007
During in March 2007, I could track and observe 5 resident orangutans.
Total observation time was 57 hours. The encounter rate of orangutan was
31.4% in March.I succeeded in the recording of the sound of Long Call of
flanged male. I was able to record the long call sound which flanged male
was surprised and uttered during rest by the nest when the branch had
fallen from on the head to the nest.