CHICAGO (CBS) — Mondika, the baby gorilla born on Mother’s Day at the Lincoln Park Zoo, posed for a photo with his tongue out, and zoo officials say he’s teething.

Mondika has five teeth and zoo officials said he can be spotted “playfully trying to chew on mom Rollie.”

(Lincoln Park Zoo)

Another baby was recently welcomed into the western lowland gorilla troop. Bana, 24, gave birth to the healthy infant exactly one month after Mondika was born to Rollie on May 12.

Western lowland gorilla Bana, 24, welcomed a baby on June 12. (Credit: Christopher Bijalba / Lincoln Park Zoo)