Summary: They were abundant approximately 10 000 years ago and became extinct along with most other North American giant animals megafauna The vast majority of fossils recovered have been from the La Brea Tar Pits in California and in Florida It averaged about 1 5 metres 5 feet in length and weighed about 50 kilograms 110 pounds though large specimens may have weighed as much as 80kg 175 pounds Some Grey wolves were taller and they all were faster than this fellow Image Search Content inclusion
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