Pikas are the exception. They have short ears and no tail. Lagomorphs are herbivores and have strong, sharp incisors that help them clip plant parts and chew on bark. . They are small animals that gnaw. They have long, sharp incisors on both the lower and upper jaw.
Most rodents are herbivores.
There are over 2000 species of rodents. They make up almost half of all the mammal species. They are found in all parts of the world except for Antarctica and New Zealand. . Cetaceans have long torpedo-shaped bodies and tails that end in flukes. They have an air or blow hole on the top of their head.