Endangered Wolf Center
The Endangered Wolf Center is a non-profit wildlife facility in Eureka, Missouri, United States, near St. Louis that is dedicated to preserving and reintroducing to the wild critically endangered species of wolves. It is certified by the Association of Zoos and Aquariums (AZA). The Center was founded in 1971 by renowned naturalist Marlin Perkins and his wife Carol, who saw that wolves around the world were in danger of becoming extinct. Its mission is to preserve and protect Mexican wolves, red wolves, and other wild canid species, with purpose and passion, through carefully managed breeding, reintroduction and inspiring education programs. Animals born at the facility have been reintroduced to North Carolina (red wolves) and Arizona and New Mexico (Mexican wolves). The Center's research focuses on reproductive, behavioral and nutritional needs for the species housed there. The Endangered Wolf Center is a founding member of the AZA’s Mexican Wolf and Red Wolf Species Survival Plans. As of August 2016, the Center had six species of endangered canids: Mexican wolves, red wolves, maned wolves, African painted dogs, fennec foxes and swift foxes. It had more than 20 Mexican gray wolves, more than any other managed breeding facility. (Only 97 Mexican wolves were known to exist in the wild as of 2015.) The Center serves as the cornerstone of the U.S. Fish and Wildlife Service's program to preserve Mexican wolves and reintroduce them to the wild.
List of endangered species in North America
"Canis lupus baileyi" (Mexican wolf) 
"Canis lupus rufus" (red wolf)
"Dipodomys casks" (Stephen's kangaroo rat)
"Dipodomys heermanni morroensis" (Morro Bay kangaroo rat)
"Dipodomys ingens" (giant kangaroo rat) 
"Dipodomys merriami parvus" (San Bernardino Merriam's kangaroo rat)
"Dipodomys nitratoides" (kangaroo rat) (vulnerable)
"Dipodomys stephensi" (Stephens's kangaroo rat)
"Eumetopias jubatus" (Steller sea lion) Western Distinct Population Segment only (Alaska)
"Eumops floridanus" (Florida bonneted bat)
"Lasiurus cinereus semotus" (Hawaiian hoary bat) 
"Leopardus pardalis" (Ocelot)
"Leptonycteris curasoae yerbabuenae" (lesser long-nosed bat)
"Leptonycteris nivalis" (Mexican long-nosed bat)
"Microtus californicus scirpensis" (Amargosa vole)
"Microtus mexicanus hualpaiensis" (Mexican Hualapai vole)
"Mustela nigripes" (black-footed ferret)
"Myotis grisescens" (gray bat)
"Myotis sodalis" (Indiana bat)
"Neotoma fuscipes riparia" (riparian woodrat)
"Odocoileus hemionus cerrosensis" (Cedros Island mule deer)
"Oryzomys palustris natator" (rice rat)
"Ovis canadensis californiana" (California bighorn sheep)
"Perognathus longimembris pacificus" (Pacific pocket mouse)
"Peromyscus gossypinus allapaticola" (Key Largo cotton mouse)
"Puma yagouaroundi cacomitli" (Gulf Coast jaguarundi)
"Puma yagouaroundi tolteca" (Sinaloan jaguarundi) 
"Rangifer tarandus caribou" (woodland caribou)
"Reithrodontomys raviventris" (salt marsh harvest mouse) (vulnerable)
"Sciurus niger cinereus" (Delmarva Peninsula fox squirrel)
"Sorex ornatus relictus" (Buena Vista Lake ornate shrew)
"Tamiasciurus hudsonicus grahamensis" (Mount Graham red squirrel)
"Trichechus manatus" (West Indian manatee)
"Urocyon littoralis" (island fox)
"Ursus arctos horribilis" (grizzly bear) Listed as threatened in lower 48 states only. Other distinct population segments are secure or experimental 
"Vulpes macrotis mutica" (San Joaquin kit fox)
"Marmota vancouverensis" (Vancouver Island marmot)
"Puma concolor coryi" (Florida panther).