Posted by: Kirsten Pisto, Communications If you missed the Great Ape Senior Celebration on Saturday (or just want to relive the jubilee) check out a few of our favorite photos from the birthday festivities honoring orangutans, Chinta and Towan as well as gorillas, Pete and Nina. Photo by Stan Milkowski/ Woodland Park Zoo Twin orangutans Chinta and Towan celebrated their 47th birthday with special treats, birthday decorations and a whole lot of party guests! Born in 1968, the twins were the first born in a zoo. Towan is now the oldest male orangutan in North America. Born at Woodland Park Zoo, the twin orangutans gained instant national celebrity status as the first-known twin orangutans born in a zoo. Photos of the pair in diapers appeared around the globe, including “Life” magazine. While other twins have since been born, twin orangutan births are still a rare occurrence. A handful of fruit and a fistful of presents...what could be better? Photo by Stan Milkowski/ Woo