Reviewed by Jennifer Robinson, MD on0/, 014. Weight cycling is losing weight and regaining it over and over. It's called yo-yo dieting when it happens because of dieting. Weight cycles can be big (50 pounds or more) or small (5-10 pounds).
Ostriches share the order Struthioniformes with the kiwis, and other ratites. It is distinctive in its appearance, with a long neck and legs and the ability to run at maximum speeds of about 70 km/h (45 mph), the top land speed of any bird. The ostrich is the largest living species of bird and lays the largest egg of any living bird.
Giant tortoises move very slowly on dry land, at only 0.17 mph (0.27 km/h). The fastest recorded tortoise speed is 5 mph (8.0 km/h). The tortoise starts digging the ground to form its hybernaculum at the first signs of autumn. It digs with its fore-feet in a very slow motion, and prefers swampy grounds where it could bury itself in mud.