Riparian habitats are found along the edge of rivers, streams or other watercourses. On the Refuge these are located along Cave Creek and the Collection Ditch. Habitat associated with Cave Creek is riparian woodland which is composed of Aspen, Cottonwood, and Willow trees, as well as Gooseberry, Wild Rose, and other shrubs and grasses. This area is highly attractive to nesting songbirds, raptors, neotropical migrants, Porcupines, Western Cottontail rabbits, and Mule Deer. Riparian habitat along the Collection Ditch, a man-made canal that collects spring water from a number of sources and flows southward, primarily consists of Willow shrubs, Wild Rose, and various grasses, sedges, and forbs. Yellow Warblers nest in the Willow thickets which also provide shade for Rainbow Trout lurking in the clear water. Northern Leopard Frogs also utilize this riparian zone where they spend much time foraging for insects in the lush wet meadow vegetation adjacent to sections of the Collection Ditch.