Primary research for ethological and ecological study of wild
Period of visit: 8th August,2005-28th October,2005
Danum Valley Conservation Area, Sabah, Malaysia
I observed 22 orangutans and many social interactions during this
research. Monthly nest census and fruits census were continued, too.
Additionally I maintained the old trails to follow orangutans steadily for
the large area and long time rather than before. I arranged to borrow the
assistants and the equipments to observe orangutans on the tree.
Playing young animals（left: Juvenile Female, middle: Adolescent
Female, right: Baby Male）* They were not uterine.
Unflanged-Male (Name: Aki)