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From Wikipedia:
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The grey wolf or gray wolf (Canis lupus), also known as the timber wolf or simply wolf, is a mammal of the order Carnivora. The gray wolf is the largest wild member of the Canidae family and an ice age survivor originating during the Late Pleistocene around 300,000 years ago. DNA sequencing and genetic drift studies indicate that the gray wolf shares a common ancestry with the domestic dog, (Canis lupus familiaris) and might be its ancestor. A number of other gray wolf subspecies have been identified, though the actual number of subspecies is still open to discussion. Gray wolves are typically apex predators in the ecosystems they occupy. Gray wolves are highly adaptable and have thrived in temperate forests, deserts, mountains, tundra, taiga, grasslands and even urban areas. |
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The jaguar (Panthera onca, pronounced /ˈdʒæɡju.ə/ or /ˈdʒæɡjuˌɑː/ in British English, or /ˈdʒæɡwɑr/ in American English) is a New World mammal of the Felidae family and one of four "big cats" in the Panthera genus, along with the tiger, lion, and leopard of the Old World. It is the only Panthera found in the New World. The jaguar is the third-largest feline after the tiger and the lion, and on average the largest and most powerful feline in the Western Hemisphere. The jaguar's present range extends from Mexico across much of Central America and south to Paraguay and northern Argentina. Other than occasional visits from wandering jaguars from Mexico, the cat has largely been extirpated from the USA since the early 1970s.
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Pitbull vs Wolf, 
