 Plant species used by black @-@ tailed jackrabbits are well documented for desert regions . Forage use in other regions is less well known . However , black @-@ tailed jackrabbits browse Douglas fir ( Pseudotsuga menziesii ) , ponderosa pine ( Pinus ponderosa ) , lodgepole pine ( P. contorta ) , and western hemlock ( Tsuga heterophylla ) seedlings , and oak ( Quercus spp . ) seedlings and sprouts . 
