the gray wolf, Canis lupus, sometimes designated as the subspecies C. lupus occidentalis: formerly common in northern North America but now greatly reduced in number and rare in the conterminous U.S.
Origin
1875-80
Examples from the web for timber wolf
However, in those areas the commonly used name is timber wolf.
British Dictionary definitions for timber wolf
timber wolf
noun
1.
a variety of the wolf, Canis lupus, having a grey brindled coat and occurring in forested northern regions, esp of North America Also called grey wolf