Kuwait's marine and littoral ecosystems contain the bulk of the country's biodiversity heritage. Twenty eight species of mammal are found in Kuwait; animals such as gerboa, desert rabbits and hedgehogs are common in the desert. Large carnivores, such as the wolf, caracal and jackal, are not found. Among the endangered mammalian species are the red fox and wild cat. Causes for wildlife extinction are habitat destruction and extensive unregulated hunting. Forty reptile species have been recorded although none are endemic to Kuwait.