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SUMMARY AND DISCUSSION
Herpetofauna encountered on survey sites
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acreage Area South Haystack black-footed ferret black-footed ferret skulls black-footed ferret survey black-tailed prairie dog burrow entrances Burrowing owl China Butte Hanna coal lease sites coal occurrence areas detecting black-footed ferrets feet ferret sign Fish and Wildlife footed ferret Hanna 2 R&PP Hanna 8 Hanna Hanna 9 Survey Hanna Review Sites Haystack China Butte holes counted holes per acre Lechleitner 1966 Long-tailed weasel mammals Martin and Schroeder Mean number mounds Mustela mustelid Night Surveys night vision goggles number of holes Peter Kiewit Sons prairie dog colonies prairie dog holes prairie dog skulls prairie dog towns PRLA Wildcat Hanna R&PP Sheridan PRLA sage grouse scats were found scent dogs Schroeder 1978 search for black-footed Sheridan PRLA Wildcat skeletal remains snow South Haystack China species Survey Period tailed prairie dog tailed white teams Tileston and Lechleitner U.S. Fish Uinta ground squirrel White-faced ibis white-tailed jackrabbits white-tailed prairie dog Wyoming