Endemism

Endemism is the ecological state of being unique to a defined geographic location, such as an island, nation or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. The extreme opposite of endemism is cosmopolitan distribution. Physical, climatic, and biological factors can contribute to endemism. The Orange-breasted Sunbird is exclusively found in the fynbos vegetation zone of southwestern South Africa.