Parkinson's disease causes tremors.
The Newfoundland wolf -LRB- Canis lupus beothucus -RRB- was a possible subspecies of gray wolf native to Newfoundland .. Canis. Canis. subspecies of gray wolf. Subspecies of Canis lupus. Newfoundland. Newfoundland. It was described as being a medium-sized , slender-skulled wolf with a white pelt , though melanists also occurred .. The last specimen was reportedly killed in 1911 .. , it is considered a valid subspecies by MSW3 , though it is classed as a synonym of C. l. nubilus by the United States Fish and Wildlife Service .. MSW3. MSW3. synonym. Synonym ( taxonomy ). C. l. nubilus. Great Plains wolf. United States Fish and Wildlife Service. United States Fish and Wildlife Service