WCS conservationists working in Tanzania's Tarangire National Park have not one but two good reasons to be hopeful for the park's savanna elephant population: a pair of rare twin calves who have recently joined their mother's herd. Researchers for WCS (Wildlife Conservation Society) who have been studying the Tarangire ecosystem's northern subpopulation for 25 years recently spotted the calves--one male and one female--during their monitoring efforts and have been keeping a close eye on the infant animals. It is estimated that one percent of all elephant conceptions results in twins. The twins are both doing well and are already approximately eight months old. They will continue to suckle with their mother for another three to four years while making the transition to the park's lush vegetation.