The Saint Louis Zoo Sumatran orangutan family is comprised of three individuals: one male and two females. The male is Robert B., and the females are Merah (the Wily Thinker) and Rubih (Baby Girl).

Who's Who


Patient, calculating and picky are characteristics that help make Merah a great mom. An avid nester, she is picky about what she'll use to build her nest -- arranging it just like she wants it. She enjoys wearing T-shirts or making “capes” out of cloth. Her patience is helpful when using a tool to fish honey out of a tree stump.


Although the baby of the family, Rubih has already begun to show a petite and cute personality. She is exploring the world but never far from mom. She is very athletic.

Robert B.

Coming soon!