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C~ <br />J <br />Family Cricetidae <br />(Reithrodontomys montanus <br />Reithrodontormgs megalotis <br />P,;romyscus maniculatus <br />P,;ro~~,ysc;~s diffieiZd~ <br />Orychomys Zeucogaster <br />Neotoma mexicana <br />lleotoma cinerea <br />Clethrionomys gapperi <br />Phenacomys intermedius <br />llicrotus pennsyZvanicus <br />i,icrotus montanus <br />N.icrotus Zongicaudus <br />(ldicrotus ochrogaster <br />Ondat:•a zibethicus <br />G • <br />Native Mice and Rats <br />Plains HarvesC :fouse)* <br />Western Harvest Mouse <br />Deer Mouse <br />Rock Mousn <br />Northern Grasshopper Mouse <br />Mexican Woodrat <br />Bushy-tailed Woodrat <br />Gapper's Red-backed Vole <br />Heather Vole <br />Meadow Vole <br />Montane Vole <br />Long-tailed Vole <br />Prairie Vole)* <br />Muskrat <br />*Although not recorded from Boulder County, Armstrong (1972) showed <br />extreme eastern Boulder County as within the range's of these species. <br />Of these 14 species of cricetid rodent which are either known or <br />erected to occur in Boulder County, 2 species, Gapper's Red-backed and <br />licather Voles, occur only at higher elevations; we recorded 2 of the <br />re^~aining 12 species during field studies on the Hennigh and Zizgle <br />properties, the Muskrat and Deer Mouse; Pfuskrats were common along the <br />St. Vrain River, prior to channelization, and more so along the ditches <br />bordered by dense cover; Deer Mice were trapped in the black lo~_ust <br />~c-ove on tlce Hennigh property; although it is not possible to s~ceculate <br />on tFe status of the other 10 species of cricetid rodent which clay <br />occur :.n the study area, habitat conditions are poor, and current <br />po,~ulations arc thous:~t to range from none to loco, <br />