The relative number of birds using different habitats differs from species richness. Aspen forests had the highest species richness, yet aspen ranked only third in the numbers of birds (9.28) detected per count unit. The mixed-conifer habitat had the highest numbers of birds per count unit. Serviceberry vegetation had the second highest average number of bird detections (10 individuals per unit counted). The importance of this habitat for birds like the green-tailed towhee, that depend on dense shrubs for nesting, and American robin and western tanagers that eat serviceberries could account for the high numbers of birds observed where serviceberry shrubs are common.
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