The Denver Zoo is part of the (American) Association of Zoos and Aquariums (AZA) Species Survival Plan for many species. As an active member of the World Association of Zoos and Aquariums (WAZA), Denver Zoo works with other zoos and aquariums around the world to respond to the global extinction crisis facing the world's frogs and other amphibians. Denver Zoo works with conservationists in Peru to save wild populations of the endangered Lake Titicaca frog and Lake Junin giant frog. Amphibian experts with the zoo have had rare success breeding boreal toads, listed as endangered in several western states, and have released over 600 young toads in southwestern Utah.