62 species of mammals of Argentina are threatened with extiction.

The populations of most mammal species are diminishing, mainly due to transformation of wild habitats and other problems caused by the expansion of the human population: deforestation, hunting, roadkill, poisoning, etc.  In the year 2003 some 62 species of mammals of Argentina are threatened with extiction, but doubtlessly many others now have very reduced and fragmented populations. Land clearing, crops, highways - even cities - result in the elimination of wild habitats, which are the only places in which these animals can survive.  As populations become fragmented there is no chance of genetic exchange between the isolated groups, leading to high risk of local extinction and eventually global extermination. Many species of Argentina are no longer found in vast parts of their original ranges, where they might still have been found only a few years back.

Orden / Order	Comprende / Includes	Especies que tienen foto	Species that have a photo
Didelphimorphia	Comadrejas Opossums	FAM. DIDELPHIDAE: (comadrejas) - Comadreja Overa (Picaza) (4) - Comadreja Colorada (1)	FAM. DIDELPHIDAE: (opossums) - White-eared Opossum (4) - Thick-tailed Opossum (1)

Eutheria - Mamíferos placentados
Eutheria - Placental Mammals

Orden / Order	Comprende / Includes	Fotos	Photos
Xenarthra	Perezoso, Oso Hormiguero, Mulitas Sloths, Anteaters, Armadillos	FAM. MYRMECOPHAGIDAE (osos hormigueros): - Oso Hormiguero (2) FAM. DASYPODIDAE (peludos, piches): - Peludo (1) - Piche llorón (4) - Piche Patagónico(2) - Mulita pampeana (3) - Mulita Grande (1) (muerta)	FAM. MYRMECOPHAGIDAE (ant eaters): - Giant Anteater (2) FAM. DASYPODIDAE (armadillos): - Larger Hairy Armadillo (1) - Litte (or Small) Hairy Armadillo (4) - Pichi Armadillo (2) - Southern lesser long-nosed armadillo (3) - Common Long-nosed (Nine-banded) Armadillo (1)
Lagomorpha	Conejos, Liebres Rabbits, Hares	FAM. LEPORIDAE (liebres, conejos): - Conejo Tapetí (1) - Conejo Europeo (7) [INTRODUCIDA] - Liebre Europea (6) [INTRODUCIDA]	FAM. LEPORIDAE (hares, rabbits): - Tapeti Rabbit (1) - European Rabbit (7) [INTRODUCED] - European Hare (6) [INTRODUCED]
Rodentia	Roedores Rodents	FAM. SCIURIDAE (ardillas): - Ardilla gris (3) FAM. CAVIIDAE (cuices, maras): - Cuis Grande (6) - Cuis Chico (4) - Conejo de los Palos (1) - Mara (3) FAM. MURIDAE (ratas, lauchas): - Rata Europea (4) [INTRODUCIDA] - Laucha Europea (3) [INTRODUCIDA] FAM. CRICETIDAE (ratas, lauchas): - Rata Nutria Colorada (1) - Ratón de Pastizal Pampeano (2) FAM. CTENOMYIDAE (Tucu-tucos) - Tucu-tuco de los talares (2) FAM. CHINCHILLIDAE (vizcachas, chinchillas): - Vizcacha (5) - Chinchillón (1) FAM. DASYPRODACTIDAE (Agutíes): - Agutí Bayo (1) FAM. MYOCASTORIDAE (nutrias): - Coipo (12) - Castor (6) [INTRODUCIDA] FAM. HYDROCHAERIDAE (carpinchos): - Carpincho (11)	FAM. SCIURIDAE (squirrels): - Brazilian (or Olive-colored) squirrel (3) AM. CAVIIDAE (cavies, maras): - Pampas Cavy (6) - Least (or Patagonian Lesser) Cavy (4) - Chacoan Mara (1) - Mara or Patagonian Hare (3) FAM. MURIDA (rats, mice): - Roof Rat (4) [INTRODUCED] - House Mouse (3) [INTRODUCED] FAM. CRICETIDAE (New World rats & mice): - Web-footed Marsh Rat (1) - Azara's Grass Mouse (2) FAM. CTENOMYIDAE: - Tuco-tuco (2) FAM. CHINCHILLIDAE (vizcachas, chinchillas): - Plains Viscacha (5) - Mountain Viscacha (1) FAM. DASYPRODACTIDAE (Agoutís): - Azaras agouti (1) FAM. MYOCASTORIDAE (Beavers): - Coypu (12) - Beaver (6) [INTRODUCED] FAM. HYDROCHAERIDAE (capybaras): - Capybara (11)
Primates	Primates Primates	FAM. CEBIDAE: - Mono caí - Mono aullador negro (2) - Mono aullador rojo (4)	FAM. CEBIDAE: - Tufted capuchin monkey (1) - Black howler monkey (2) - Southern brown howler monkey (4)
Carnivora	Carnívoros Carnivores	FAM. CANIDAE (zorros, canes): - Zorro Gris (7) - Zorro Colorado (4) - Zorro de Monte (4) - Aguará Guazú (1) FAM. MUSTELIDAE (hurones, zorrinos): - Hurón Menor (1) - Zorrino Patagónico (1) - Zorrino Común (5) FAM. FELIDAE (felinos): - Puma (2 - en cautiverio) - Yaguareté (1 - en cautiverio) PROCYONIDAE (coaties): - Coatí (3) - Mayuato / Osito Lavador (2)	FAM. CANIDAE (foxes, etc.): - Argentine Gray Fox (7) - Andean Fox (4) - Crab-eating fox / common fox / forrest fox (4) - Maned Wolf (1) FAM. MUSTELIDAE (ferrets, skunks): - Southern Grison (1) - Patagonian Skunk (1) - Molina's hog-nosed skunk (5) FAM. FELIDAE (wild cats): - Puma = Mountain Lion (2 - captive) - Jaguar (1 - captive) FAM. PROCYONIDAE (raccoons): - Ring-tailed (or south american) Coati (-mundi) (3) - Crab-eating raccoon (2)
Pinnipedia	Pinípedos Pinnipeds	FAM. OTARIIDAE (lobos marinos): - Lobos Marinos (de 1 y 2 pelos) (5) - Lobo marino de un pelo sudamericano (6) - Lobo marino de dos pelos subantártico (4) FAM. PHOSIDAE (elefantes marinos, focas): - Elefante Marino (4)	FAM. OTARIIDAE (sea lions, fur seals): - Sea lions and fur seals (5) - South american sea lion (6) - Amsterdam Island fur seal (4) FAM. PHOSIDAE (true seals): - Southern Elephant Seal (4)
Artiodactyla	Ungulados Paridigitales Even-Toed Ungulates	FAM. CAMELIDAE: - Guanaco (11) - Vicuña (9) - Llama (9) - Alpaca (3) FAM. CERVIDAE: (Ciervos,corzuelas) - Ciervo de los Pantanos (12) - Corzuela Parda (2) - Corzuela Colorada (1)	FAM. CAMELIDAE: - Guanaco (11) - Vicuña (9) - Llama (9) - Alpaca (3) FAM. CERVIDAE: (Deer, brockets, etc) - Marsh Deer (12) - Brown brocket deer (2) - Red brocket deer (1)
Perissodactyla	Ungulados Imparadigitales (Tapires, caballos) Odd-toed Ungulates (Tapirs, Horses)	FAM. TAPIRIDAE (tapires): - Tapir (2, juvenil y huella)	FAM. TAPIRIDAE (tapirs): - Lowland (or S. American) Tapir (2, juvenile and footprint)
Cetacea	Cetáceos Whales & Dolphins	FAM. PONTOPORIIDAE: - Franciscana (o Delfín del Plata) (3) FAM. DELPHINIDAE: - Delfín Austral (o Delfín Oscuro?) (3) - Tonina Overa (1) - Delfín Piloto o Ballena Piloto (1 - muerta)	FAM. PONTOPORIIDAE: - La Plata river dolphin (3) FAM. DELPHINIIDAE: - Peale's (or Dusky?) Dolphin (3) - Commerson's Dolphin (1) - Long-finned Pilot Whale (1 - dead)
Chiroptera	Murciélagos Bats	FAM. MOLOSSIDAE: - Murciélago Cola de Ratón (1)	FAM. MOLOSSIDAE (Free-tailed bats): - Mexican Free-tailed Bat (1)

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