Northern crested newts feed mainly on invertebrates. The longest run on Mount Crested Butte is . Callaway in the early 1970s had bought and run an elegant resort in Crested Butte. It is crested by the white head of an eagle, atop a white rope. Another industry that served to support Crested Butte was ranching. Harrisson was instrumental in the organization of pioneering surveys of the great crested grebe. The London Zoo had crested ibises from 1872 until 1873. Sado is famous as the major breeding area for the Japanese crested ibis. An 1896 survey records 56 species of birds including the crested white-eye. Some saguaros grow in rare formations called a cristate, or "crested" saguaro. Rivers crested at record heights, causing severe flooding. The highest recorded lake levels were in December 1982, when the lake crested at . The rains also caused river flooding, including the Mahwah River which crested at . The lake crested at 483.95 feet in 1973. In Chesterfield County, the Pee Dee River crested at at Cheraw.