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 In most places in the mountains above about 8,500 feet, riparian habitats are dominated by various species of willow (Salix sp.)--usually low-growing varieties which form dense thickets. These willow tangles are home to many birds, including Willow Flycatcher, Wilson's and MacGillivray's Warblers, and Lincoln's, White-crowned and Fox Sparrows.