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LINE HABITAT OR NO. AND TYPE SPACING NUMBER OF NUMBER SUB-HABITAT OF TRAP(S) INTERVAL NIGHTS TRAPPED DATES 1 Rangeland 40-live 15 yds. 3 27-29 May 1987 2 Swale 35-live 15 yds. 3 27-29 May 1987 3 Agriculture 35-live 15 yds. 3 27-29 May 1987 4 Rangeland 10-live 15 yds. 3 27-29 May 1987 5 Orchard 16-Museum variable 1 ~ 28 May 1987 Special 6 Swale 8 rat snap variable 1 28 May 1987 9 Museum Special 7 Rangelantl 33 Museum variable 1 29 May 1987 (Pinyon-juniper! Special Special rockblu(f) 7 rat snap The fall trapping period was conducted on the evenings o f 7-9 October 1987. Trapline locations ar e shown on Map 2.04.11-1 The following sampling design was used: NO. & TYPE NUMBER HABITAT OF TRAP(S) INTERVAL NIGHTS TRAPPED DATES 1 Rangeland 45-live 15 yds. 3 7-9 October 1987 2 Swale 45-live 15 yds. 3 7-9 October 1987 8 Agriculture 45-live 15 yds. 3 7-9 October 1987 The weather throughout the trapping periods was clea r, mild, and calm with early morning • temperatures reaching near freezing. All captures were identified before release. Those specimens caught in snap traps and those that succumbed to hypothermia in live traps were saved as voucher specimens. Results are reported as number of captures per trap-night. Small mammal species diversity values of each habitat are calculated after MacArthur (1964) as H = Pi loge Pi, where, in this report, Pi is the proportion of the number of each species to the total number of captures. A prairie dog and black-footed ferret survey was conducted in the study area in compliance with U.S. Fish and Wildlife Service standards and requirements. The survey methods are presented in Peabody Attachment 11-2. All observations of mammal species seen during the course of this survey and during the baseline vegetation survey were recorded in field notebooks and later transferred to a permanent species account log. With these notes, incidental observations noted during the ferret survey, small mammal trapping results, the literature survey, and information supplied by Mr. Ron Arant, an assessment of the mammal fauna of the study area was completed. • {REVISED 6/27/01) 2.04.11-10