once again grew at lower elevations, other Abert's squirrel subspecies returned to the Grand Canyon area, filling in their former niches on the South Rim. References "Evolutionary Genetics and Phylogeography of Tassel-Eared Squirrels (Sciurus aberti)" Trip Lamb, Thomas R. Jones and Peter J. Wettstein Journal of Mammalogy Vol. 78, No. 1 (Feb., 1997), pp. 117–133 External links Photographs of Kaibab squirrels in the wild Kaibab squirrel on YouTube Sciurus Squirrel, Kaibab Endemic fauna of Arizona Natural history of the Grand Canyon Taxa named by Clinton Hart Merriam Mammals described in 1904