Attributes / relations provided by
♦ ¹Lepus othus, Troy L. Best and Travis Hill Henry, MAMMALIAN SPECIES No. 458, pp. 1-5 (1994)
♦ ²Starling-Westerberg, A. N. N. E. (2001). The habitat use and diet of black grouse Tetrao tetrix in the Pennine hills of northern England. Bird Study, 48(1), 76-89.