Food Habits
The black-tailed jackrabbit diet is composed of shrubs, small trees, grasses, and forbs. Throughout the course of a year, black-tailed jackrabbit feed on most if not all of the important plant species in a community. Growth stage and moisture content of plants may influence selection more than species. Shrubs generally comprise the bulk of fall and winter diets, while grasses and forbs are used in spring and early summer. This pattern varies with climate: herbaceous plants are grazed during greenup periods while the plants are in prereproductive to early reproductive stages, and shrubs are utilized more in dry seasons. Shrubs are browsed throughout the year, however. Most of a jackrabbit's (Lepus spp.) body water is replaced by foraging water-rich vegetation. Jackrabbit require a plant's water weight to be at least five times its dry weight in order to meet daily water intake requirements. Therefore, black-tailed jackrabbits switch to phreatophyte (deep-rooted) shrubs when herbaceous vegetation is recovering from their foraging.
Plant species used by black-tailed jackrabbit are well documented for desert regions. Forage use in other regions is less well known. However, black-tailed jackrabbit 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.
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