Meet the massive bison -- the largest mammal in North America. Wild Life LOL! Series introduces young readers (Ages 6-8) to some of the most amazing animals on the planet in a Laugh-out-loud funny way. Each book is brimming with colorful photos, bite sized text, wacky facts, jokes and riddles. It´s hard to believe these powerhouses of the prairies eat only plants ... lots and lots of plants. Bison spend 9 to 11 hours a day feeding.