I know this is an old photo but was prompted to do a photo search (this site is so addictive ......) by another Singapore Zoo photo I saw earlier today.
How utterly fantastic to have free ranging orangs ........ fantastic for the visitor but most of all for the animals themselves. Am guessing they are constrained by hot wiring ?
My daughter visited the zoo last week and said that I (a huge orangutan fan) would have been in heaven. She also said it was the best zoo she'd ever been to.