15 little-known facts about giraffes Part I 1. Giraffe is only one animal who is not able to yawn. Almost the entire warm-blooded and cold-blooded animals open its mouth widely periodically in attempt to sate with oxygen – this do birds, fishes and mammals. The average person yawns approximately 250 thousand times per all his life. However, giraffe is not the same. It does not yawn no one times during all its life. At least for the all giraffe observation history the scientists were not failed into the catching the giraffes with doing this act. 2. But giraffes are able to moo, hiss, growl and whistle. All these sound set they use to communicate with their relatives. 3. The length of giraffe’s tongue is about 50 centimeters. 4. The color of giraffe’s tongue is black. 5. In addition to having an outstanding neck, giraffes are the first among the all mammals with the tail length – it can reach the 2.5 meters length. 6. Giraffes like a raw onion. 7. The ancient Greeks and Romans considered that giraffe is a result of passionate love between a camel and leopard. 8. Anxious giraffe's heart beats 170 times per minute. 9. Moms of young giraffes organize a kinder garden: one adult female is watch for the cubs, and all other friendly crowd goes to get food.