The Útila spiny-tailed iguana, Ctenosaura bakeri (Stejneger, 1901), is a Critically Endangered iguana endemic to the island of Útila, in the Bay Islands archipelago of Honduras.  The species occurs almost exclusively in the highly dynamic mangrove habitat on Útila (Gutsche, 2005), and is threatened by the encroachment of anthropogenic activities, as habitat destruction and development continue across the island. Bringing together local and international expertise, this 5-year action plan communicates a series of steps and goals designed to facilitate the conservation management of Útila spiny-tailed iguanas.