Satu, with mama Miri. Photo by Zoo Atlanta.

Zoo Atlanta already has the nation’s largest population of orangutans, but it may be adding another to the family next year. From an AJC story published today:

Miri is still raising her last baby, Satu, born in November 2003, but keepers have observed swelling in her external reproductive areas and are hopeful she’ll deliver sometime early next spring.

Bornean orangutans are listed as endangered, and Sumatran orangutans are listed as critically endangered on the World Conservation Union Red List of Threatened Species.

Orangutans are the subject of the zoo’s Discovery Talk Series presentation tonight by Willie Smits, founder of Borneo Orangutan Survival.

Want to go? Orangutan Discovery Talk, 6 p.m. Sept. 3. $7, $5 for members. Zoo Atlanta, 800 Cherokee Ave S.E. in Atlanta’s Grant Park. 404-624-9453, www.zooatlanta.org.