The diets of Roosevelt elk (Cervus elaphus roosevelti) and Columbian black-tailed deer (Odocoileus hemionus columbianus) were very similar and consisted of similar seral affinities. During the fall of 1980, the elk and deer had 49% dietary overlap, followed by a 75% overlap in the winter of 1981. Deer tended to consume more browse (summer diet: 6.6% grass and 34% browse), while elk consumed more grass (summer diet: 16.4% grass and 15.8% browse). These results suggest that forage partitioning along the sere did not occur between the two species.
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