Habits of Microtus californicus Revealed by Automatic Photographic Recorders

摘要: INTRODUCTION This report is based upon photographic records, made over a period of 19 months, animals using the runways meadow mice, Mierotus californicus (Peale), in grass and weed habitat at Orinda, Contra Costa County, California. When an animal passed along runway front one two recorders, it was photographed date, time, temperature, relative humidity were recorded. Many mice had been live-trapped marked distinctively to make them individually recognizable photographs. Details apparatus, habitat, procedure have described elsewhere, 27 other species Microtus listed (Pearson 1959). Meadow by far most frequent users, with harvest Reithrodontomys megalotis (Baird), second active species. No clear evidence obtained any interaction between these