Mud (Kinosternon spp.) and musk (Sternotherus spp.) turtles are two common, hardy species that remain rather small. While most remain less than 5 inches in length, a few individuals may grow slightly larger. Mud and musk turtles are primarily aquatic, though they require a small land area on which they can bask. Mud and musk turtles are omnivorous, but they eat insects, fish, worms and carrion in the wild. A note about these relatively small turtles: they can make a pretty big stink. When these turtles feel threatened, they can release a musky odor.
According to the Ontario Ministry of Agriculture, the average lifespan of a horse is 28 + 5 years. That means the average lifespan of a domestic horse is 25 to 33 years. Many horses go well beyond this average. Ponies tend to live longer with many ponies still serving as schoolmasters well into their 30s. A few ponies and horses may even reach the age of 40 or over. The oldest horse ever recorded was 52 years old.
There are more than 400 different breeds of horses. Horses can be as big as 69 inches (175 centimeters) from hoof to shoulder and weigh as much as 2,200 lbs. (998 kilograms). Tiny horses exist, too. The smallest breeds of horses can be as small as 30 inches (76 centimeters) from hoof to shoulder and weigh only 120 lbs. (54 kg), according to National Geographic.