2005 – Puerto Rican herpetologists first discovered the coquí llanero.
May 2007 – Recognizing the imminent threats to the coquí's habitat, the Caribbean Primate Research Center petitioned to list the frog under the Endangered Species Act.
July 8, 2009 – The U.S. Fish and Wildlife Service announced that the coquí llanero might warrant Endangered Species Act protection and initiated a status review.
October 12, 2011 – The Service proposed that the coquí llanero be listed as endangered, as well as granting critical habitat.
October 26, 2011 – The Center and allies notified the Army Corps of Engineers of our intent to sue over violations of the Endangered Species Act due to the proposed Vía Verde pipeline's impacts on dozens of imperiled species, including the coquí llanero.
December 12, 2011 – The Center and allies petitioned the Fish and Wildlife Service to emergency-list the coquí llanero due to the imminent threat of the Vía Verde pipeline.
October 4, 2012 – The Service listed the coquí llanero as an endangered species.