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 Pinyon-Juniper, affectionately called "PJ", dominates the slopes above the sagebrush and below the ponderosa belt in southern and western Colorado. Neither the pinyon (Pinus edulis) nor the juniper (Sabina sp.) usually grows higher than about 10 feet tall, and both tend to grow widely spaced. Associated birds include Black-chinned Hummingbird, Cassin's Kingbird, Gray Flycatcher, Gray Vireo, Pinyon Jay, Bewick's Wren, Juniper Titmouse, Bushtit, Black-throated Gray Warbler, Black-throated Sparrow, and Scott's Oriole (rare).