 In 2004, census data were still not available.Based on information by wildlife researchers, it was estimated that 50 to 150 lions reside in Arly-Singou.Previously the endangered painted hunting dog, "Lycaon pictus", occurred in Burkina Faso within the Arly-Singou ecosystem, but, although last sightings were made in Arli National Park, the species is considered extirpated throughout Burkina Faso.