Home Newsroom News Archive News Archive Skip filter form Search Term Sort by RelevanceDate Filter By By Animal - + Abyssinian ground hornbill Aldabra tortoise Allen's swamp monkey American bison American flamingo Andean bear Asian elephant Asian small-clawed otter Asian water dragon Beaver Bennett's wallaby Black-and-white ruffed lemur Black-footed ferret Blue crane California sea lion Cheetah Clouded leopard Corals and sea anemones (anthozoa) Cow Dama gazelle Eld's deer Electric eel Emperor tamarin Fishing cat Gaboon viper Giant panda Goat (-) Gray wolf Grevy's zebra Guam kingfisher (sihek) Guam rail (ko’ko’) Home's hinge-back tortoise Hooded crane Japanese giant salamander Lesser kudu Lion Naked mole-rat North American river otter North Island brown kiwi Orangutan Persian onager Prehensile-tailed porcupine Przewalski's horse Red-fronted lemur Red panda Ring-tailed lemur Scimitar-horned oryx Sloth bear Tanagers Tiger Titi monkey Twig catfish Two-toed sloth Western lowland gorilla Whooping crane No result By Year - + 2020 (-) 2019 2018 2017 Displaying 1 - 1 of 1 articles. April 23, 2019 Elderly Gray Wolf Dies at Smithsonian’s National Zoo American Trail keepers at the Smithsonian’s National Zoo are mourning the loss of Crystal, a female gray wolf who was humanely euthanized Sunday, April 21. At 14 years old, Crystal was considered geriatric for her species.