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Giant pika
Giant pika, Wharton's pika (''Ochotona whartoni'') is an extinct Pleistocene and early Holocene species of mammal in the family Ochotonidae,〔 distributed in the northern parts of North America (Alaska, USA and Canada).〔〔 Very similar forms were found also in Siberia.〔〔 ==Distribution== Giant pika was found in Alaska〔〔〔〔 (United States), Yukon〔〔 (''O. whartoni''〔 and ''O'' cf. ''whartoni'',〔〔 large number of locations), Alberta〔 and Ontario (Canada).〔 ''Ochotona'' near ''O. whartoni'' (''O.'' cf. ''whartoni'') is known from Eastern Siberia and Kolyma as well.〔〔 Giant pika ''O. whartoni'' immigrated from Eurasia to North America during the Early Pleistocene via the Bering Land Bridge, along with small pikas close to the "''O. pusilla'' group". Much earlier at the Miocene-Pliocene boundary came ''O. spanglei''〔 - the oldest ''Ochotona'' found in North America, what was followed by approximately three million year long gap in the known North American pikas record.〔
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