Habitats and their associated birds Colorado is blessed with a tremendous variety of habitat types, which results in a tremendous variety of birds. In order to find a bird, you are best off looking for its habitat, and this requires at least a basic knowledge of Colorado's flora and geology. This section describes the main habitat types and some birds that are associated with them and may be hard to find elsewhere. Sagebrush Foothill Shrubs Spruce-Fir Forest Yucca Ponderosa Pine Forest Alpine Tundra Shortgrass Prairie Aspen Groves Cliff Faces Lowland Riparian Woodland Lodgepole Pine Forest Subalpine Life Zone Scrub Oak Woodland Streamside Willows Rimrock and Mesa Country Pinyon-Juniper Forest Rimrock is the term for the distinctive outcrops that can run for miles in the same geological layer, forming the rims of valleys and mesas in the southwest part of the state, parts of the Arkansas River Valley, and other scattered locations. Species associated to a strong degree with rimrock in Colorado include Chukar, Greater Roadrunner and Rufous-crowned Sparrow.