May 8, 2002 – The Center petitioned the U.S. Fish and Wildlife Service to list the relict leopard frog as an endangered species. The Service designated the frog as a candidate for listing.
2005 – The Center filed a lawsuit against the Service for failing to make expeditious progress in protecting the relict leopard frog.
July 12, 2011 – The Center reached a landmark agreement with the Fish and Wildlife Service compelling the agency to move forward in the protection process for 757 species, including the relict leopard frog.