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 Large areas of the foothills and mesas south and west of Denver are covered by nearly pure stands of the native Scrub Oak (Quercus gambelii), which rarely grows higher than 10 or 15 feet. This habitat is not usually very birdy, but Spotted Towhee is abundant, and especially in the northwest part of the state, the oaks can be good for Blue Grouse.