I had mentioned before that Karl Shuker had an informant who spoke of a creature much like an orangutan inhabiting New Guinea. Whether this is the same or a different informant, here is one of Karl's blogs, which describes a creature from New Guinea with the corresponding height and description, and described with much the same sort of behaviour as ascribed to orangutan-like creatures in Mainland Southeast Asia and in the Phillipines:
Sunday, 10 January 2010
KAYADI - THE BIGFOOT OF PAPUA NEW GUINEA
[I do not intend to copy down Karl's entire blog but here is a paragraph of especial interest]
According to their accounts, this New Guinea ape-man, known to the Amto people as the kayadi, was at least man-sized (i.e. about 5 ft 5 in tall, judging from the average height of most native peoples on New Guinea), hirsute, and bipedal, but also able to climb trees very rapidly, and strong enough physically to throw humans if confronted. One Amti tribesman stated that in 1981 a kayadi had been startled by his uncle while digging for eggs in a cave near his village, and another claimed that a local girl had actually been kidnapped a while back by one of these man-beasts.
I see no reason why these reports could not also be illegally-captured and illegally-released orangutans such as the comparable creatures in Australia seem to be.
Best Wishes, Dale D.