102 



There are an abundance of likely looking nest cavities scattered 

 among the sandstone buttes and cliffs In the study area. It 

 would seem that more active prairie falcon pairs should have 

 been located. Some other factor, perhaps lack of prey base. Is 

 limiting the prairie falcon population in this vicinity. 



A peregrine falcon was observed flying over ponderosa pine cover 

 in the southwest portion of the study area. Since it was seen 

 only one time it was assumed to be a migratory bird. 



One great-horned owl nest with three fledglings was located 

 during the helicopter survey (Table 42). It was in a ponderosa 

 pine tree in the southeastern portion of the study area. Several 

 great-horned owls were observed along the southern border of the 

 study area but no other nests were found. 



Nongame Mammals 



Twenty-one mammal species were observed on the Greenleaf-Mlller 

 study area (Table H3) . The black-tailed prairie dog was the 

 only nongame species of special Interest or concern (Flath 198I). 

 Pour prairie dog towns were located on the study area (Figure 57). 

 The three smaller towns had no sign of black-footed ferrets or 

 burrowing owls. The large town on the upper portion of Greenleaf 

 Creek near the southern boundary of the study area was not visited 

 because the landowner would not grant access. 



The results of summer and fall small mammal trapping are presented 

 in Table 44. Trapllne locations are shown in Figure 54. Only 

 five rodent species were captured. The deer mouse was the most 

 common, occurring in all three vegetation types in both seasons. 

 The house mouse had the highest density of any species as 11 and 9 

 were caotured in the riparian summer and fall trap lines respectively, 

 One masked shrew and one prairie vole were also captured in the 

 rioarian summer trapllne. Two bushy-tailed wood rats [Uzotoma 

 c-tne/iea) were captured in the ponderosa pine summer trap line. 



No trap line had a success ratio greater than 2.0 captures per 100 

 trao nights. This very low density of rodents may explain the 

 scarcity of raotor species in the Greenleaf-Mlller study area. 



Amphibians and Reptiles 



Two amphibian and four reptiles species were observed on the 

 Greenleaf-Mlller study area (Table 45). None of them were listed 

 by Flath (198I) as being snecies of special Interest or concern. 



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