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 Treeline is not an abrupt transition in most areas. Rather, as you move up towards and above 11,000 feet, you will notice the spruces and firs becoming noticeably smaller, until they start to assume bush form. This stunted forest is often called the krummholz. The birds in this habitat tend to be a mix of spruce-fir and tundra birds, but the dominant species is definitely White-crowned Sparrow.