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American bison (Bison bison) live in river valleys, prairies, and plains. Typical habitat is open or semi-open grasslands, as well as sagebrush, semi-arid lands and scrublands. Some lightly wooded areas are known historically to have supported bison. Bison will graze in hilly or mountainous areas where the slopes are not steep.
The refuge protects 30 river miles - 300 miles (480 km) of shoreline - from Needles, California, to Lake Havasu City, Arizona. One of the last remaining natural stretches of the lower Colorado River flows through the 20-mile-long (32 km) Topock Gorge.
Cibola National Wildlife Refuge is a U.S. National Wildlife Refuge in the floodplain of the lower Colorado River between Arizona and California and surrounded by a fringe of desert ridges and washes. The refuge encompasses both the historic Colorado River channel as well as a channelized portion constructed in the late 1960s.
The American bison (Bison bison; pl.: bison), commonly known as the American buffalo, or simply buffalo (not to be confused with true buffalo), is a species of bison that is endemic (or native) to North America. It is one of two extant species of bison, along with the European bison.
The Imperial National Wildlife Refuge protects wildlife habitat along 30 miles (50 km) of the lower Colorado River in Arizona and California, including the last un-channeled section before the river enters Mexico. The Imperial Refuge Wilderness, a federally designated, 15,056-acre (60.93 km 2), wilderness area is protected within the refuge. [1]
The Lower Colorado River Valley has unique plant communities because it is the most arid part of the desert and it has the highest temperatures, in excess of 120 °F (49 °C) during the summer. The low humidity means that most plants must have mechanisms that deal with severe water loss through evaporation.
The Little Colorado River (Hopi: Paayu) is a tributary of the Colorado River in the U.S. state of Arizona, [2] providing the principal drainage from the Painted Desert region. Together with its major tributary, the Puerco River , it drains an area of about 26,500 square miles (69,000 km 2 ) in eastern Arizona and western New Mexico .
The Lower Colorado River Valley (LCRV) has played an important role for the ecology of western Arizona and eastern California. In the past the river region was dominated by mining and agriculture and today by recreation, all of which will have an effect on he flora and forna. [1]