<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> Animal locomotion, in ethology, is any of a variety of movements or methods that animals use to move from one place to another . Some modes of locomotion are (initially) self - propelled, e.g., running, swimming, jumping, flying, hopping, soaring and gliding . There are also many animal species that depend on their environment for transportation, a type of mobility called passive locomotion, e.g., sailing (some jellyfish), kiting (spiders) and rolling (some beetles and spiders). </P> <P> Animals move for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators . For many animals, the ability to move is essential for survival and, as a result, natural selection has shaped the locomotion methods and mechanisms used by moving organisms . For example, migratory animals that travel vast distances (such as the Arctic tern) typically have a locomotion mechanism that costs very little energy per unit distance, whereas non-migratory animals that must frequently move quickly to escape predators are likely to have energetically costly, but very fast, locomotion . </P> <P> The anatomical structures that animals use for movement, including cilia, legs, wings, arms, fins, or tails, in various modes and through various media are sometimes referred to as locomotory organs or locomotory structures . </P>

Locomotion does not increase an animal's opportunity to