It is a central component of the Rebel Alliance's program of live mount scouting, and Cracian Thumper racing is a popular sport. "Crab gliders" are small, carrion eating crablike creatures native to the planet of Bespin. Patches of skin between their six legs allow them to glide around their home planet, feeding on the corpses of Beldons, giant air jellyfish. It is presumed that they keep from falling by catching updrafts from below. The croator, a creature native to Wyndigal II, a planet with extreme ultraviolet radiation exposure, is an asexual, flightless avian-like creature with reflective plumage and an unusually long proboscis, used to inhale tiny fish and insects for food. Travelers on Wyndigal II often use croator plumage as anti-radiation protection. The cthon is a zombie-like sentient humanoid that is believed to have evolved from another humanoid creature. Like the ogre, it feeds off the flesh of others. It has huge ears, enabling it to find its way around the perpetually dark Coruscant underlevels, but no eyes, as it has no use for them. Cthons live in small groups and attack the unwary, trapping them with electro nets and devouring them. They appeared in the novel "". Cy'een are huge long-necked reptilian fish that are native to the oceans of the planet Chad. Dashta eels are a species native to Ord Cestus with the ability to use the Force. They were the biological part of the JK-13 droid. Dactillions are four-legged lizard-like creatures with wings and a two part beak. They fly the skies of Utapau. Danchafs, also known as "tree goblins" by the native sentient Jenet species on the planet Garban, these arboreal creatures are ferocious pack carnivores that attack unwary travelers in Garban's forests, and can grow up to 2 m (6.5 ft) tall. Derkolo are a sentient species native to the planet Sileron. Dewbacks or Dewback lizards are large reptilian creatures native to Tatooine. They are commonly used as beasts of burden by moisture farmers. They have been described to resemble a t-rex pretending to be a camel. They move slowly at night, but are known to run at a brisk pace for short distances during the day. Both Imperial stormtroopers and Jawas have been known to utilize these large beasts.