Great Basin Naturalist


An investigation of the diet of the Common Barn-owl (Tyto alba) on Antelope Island, Great Salt Lake, Utah, yielded four mammal species not previously known to occur on any island in the Great Salt Lake (Microtus pennsylvanicus, M. montanus, Ondatra zibethicus, and a Sorex sp.). Two other species, known from other islands, were added to the list of fauna of Antelope Island (Perognathus parvus and Reithrodontomys megalotis). The barn owl diet on Antelope Island was remarkably like that of barn owls feeding in farmlands adjacent to the Great Salt Lake despite major vegetational differences.