A big surprise at a surprise birthday party at the Pittsburgh Zoo this week. Margaret, a howler monkey and her brood of thirteen offspring were helping a fellow primate celebrate her first birthday.
But it was Margaret, who gave birth during the party right there in front of everyone. Her handlers say they weren't even sure she was pregnant.
Pittsburgh Zoo officials say Margaret is their oldest howler monkey that is still reproducing. Margaret still hasn't given zoo handlers permission to inspect the baby.