not sure about a different species, but they are damn big!
The Newfoundland Lynx (Lynx canadensis subsolanus) is a subspecies of the Canadian Lynx. It is larger than the mainland subspecies. This animal is known to have killed Caribou calves when Snowshoe Hares were not available. The other two subspecies are Lynx canadensis mollipilosus and the nominate Lynx canadensis canadensis.
The lynx, in its four species has by far the largest range of any of the felids and in as much inhabits the continents on either side of the Atlantic Ocean. In the ‘New World’, the Canadian lynx is found in both Canada and Alaska, as well as in some of the northern states of the USA, where changes in habitat and over hunting have reduced its extent. Lynx found in Newfoundland are sometimes accredited as a subspecies - that of L.c.subsolanus