Wm B Richardson 1936 Microtus mordan Zones - Canadian Habitat - Along grassy stream- sides or alby less dense willows (willow and grass) loonring the stream. Often in and about fallen logs on the litter near the stream. July 21 5 Today July 22 1 " July 23 Wilson Cr, 3 mi S of Nelson, 5600 ft. Inlet C.Ca Caught 2 Faunal Area - Sierra Nevada. Zones - Transition Habitat - In the sierras and stream side grass plot. Seem to be found in colonies, which by evident workings was & in the recent past much larger. My catch included a totty July 24 I caught this morning. July 25