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.Know More
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
Some animals that eat caterpillars are wasps, reptiles, certain mammals and birds. Of these animals that prey on caterpillars, birds are their main predators. The caterpillar is the larval stage of insects like moths and butterflies.Full Answer >
Not all animals yawn, if only because many large groups of animals lack the basic anatomy necessary for yawning. Tapeworms, for example, are parasitic animals that absorb nutrients through their skin, according to HowStuffWorks, and therefore lack a mouth.Full Answer >
Although members of the kingdom Animalia are almost exclusively multicellular, there are several unicellular organisms classified as animals, including species of bacteria, protozoa, fungi, algae and archaea. Bacteria are unicellular organisms of microscopic size that contain no nucleus. They are hardy life forms that can survive in extreme environmental conditions.Full Answer >
An alphabetical listing of all animals is a catalogue or record of all the creatures of the animal kingdom with their names arranged in alphabetical order from A to Z. This list is updated frequently as more animal species are discovered.Full Answer >