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 Bearded emperor tamarin 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 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 Linné's two-toed sloth 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 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.