After a 22 month long pregnancy followed by delivery of the world’s largest babies (around 250 pounds), elephants deserve to be on this list even if they immediately abandoned their babes. But they don’t just say “thanks for all the stretch marks,” and get on their merry way, elephant mothers continue raising their babies. Baby elephants are born blind and completely dependant on their mother and the rest of the herd. While the baby is growing, they are fortunate enough to have a great support system consisting of multiple full-time babysitters, called “allmothers.” While the allmothers take care of the precious little one, the mother will work to eat as much as she can so she can make the most possible milk for her bundle of joy.