Most terrestrial animals crawl. Crawling is the characteristic mode of locomotion for most reptiles, amphibians and mammals. Insects generally crawl when they aren't flying, and terrestrial molluscs, such as snails and slugs, crawl on a single, specialized foot.Continue Reading
Newts and salamanders crawl, as do frogs and toads when they aren't hopping. Lizards crawl with a characteristic side-to-side motion that is replicated by their close relatives the snakes. Birds generally do not crawl, though some penguins slide on their bellies for high-speed and long-distance travel. Most terrestrial invertebrates crawl, and even flying species, such as flies, moths and bees, usually revert to a stepwise, six-legged locomotion to move efficiently across surfaces.
Some animals crawl at various stages of life, but not at others. Humans, for example, typically crawl in infancy and can revert to all fours when the situation calls for it, but this is slow and inefficient relative to the adults' normal upright posture.
Many terrestrial animals have ways of moving apart from crawling, such as the horse's gallop or trot and the adult human's bipedal walk, but crawling on four, six or eight legs is common. Some animals can also form a ball and roll, such as the pangolin.Learn more about Zoology
Several species of animals are color blind or see muted colors, including dogs, cats, bulls and sharks. Many fish can see muted colors.Full Answer >
Herbivores and omnivores are animals that eat plants. The herbivore is a group of animals that only eats plants, and the omnivore is a group of animals that eats both plants and animals.Full Answer >
Insects, snails, crabs, lobsters and worms are all examples of invertebrate animals. Spiders and clams are other examples. Invertebrates are animals that do not have a backbone.Full Answer >
Equatorial animals include mammals such as elephants and jaguars, amphibians and reptiles such as poison dart frogs and anacondas, and a wide variety of insects and birds. Due to habitat loss, several of these species are endangered as of 2014.Full Answer >