The Efulen forest tree frog, Leptopelis calcaratus, is a species of frog in the Hyperoliidae family found in Cameroon, the Central African Republic, the Democratic Republic of the Congo, Equatorial Guinea, Gabon, and Nigeria, and possibly the Republic of the Congo and Uganda.Its natural habitats are subtropical or tropical moist lowland forests, freshwater marshes, and intermittent freshwater marshes.It is threatened by habitat loss.