Heidi, A female Bactrian camel, born on March 21 weighing 61 pounds, sits next to her mother at the St. Louis Zoo in St. Louis on April 20, 2006. The critically endangered species is native to Mongolia in central Asia. Baby camels are born with two humps, like their parents, but at birth these lay flat against their sides until they can store up energy-rich fat. (UPI Photo/Bill Greenblatt)