During the summer months, the antelope used less of the 

 Hanging Woman Creek study area as they condensed into three 

 major use areas (Figure 27). One large group of observations 

 was made in the northeast portion of the study area north 

 of Horse Creek. Another group was concentrated in the First 

 Creek and PK Creek drainages. The third major area was 

 located along the north side of Trail Creek and extending 

 northward along the east side of Hanging Woman Creek approx- 

 imately 2 miles north of the mouth of Trail Creek. Very few 

 observations were made in the Corral Creek drainage. 



Fall antelope observations revealed a major shift in 

 antelope usage patterns (Figure 28). Many observations were 

 made in the Corral Creek drainage. Antelope were noticed to 

 be staying closer to the main water sources, PK Creek and 

 Hanging Woman Creek. There was a definite shift to the south 

 and west portions of the study area. 



Winter antelope observations are shown in Figure 29. The 

 major wintering area is seen to be along the north side of 

 Trail Creek extending northward along the east side of Hanging 

 Woman Creek. The PK Creek area is another wintering range. 

 Antelope were also observed north of Horse Creek and between 

 Corral and First Creeks. This was a mild winter with very 

 little snow cover. Therefore the antelope were able to pick 

 which ever area suited them. They may have used entirely 

 different areas under more harsh circumstances. Practically 

 all of the observations were of large groups of antelope. 



Vegetation type usage : The fact that antelope are heavily 

 dependent on sagebrush is evident in Table 34. Antelope usage 

 of the sagebrush/grassland type averaged 91 percent and ranged 

 from 81 to 99 percent during the six seasons of study. Antelope 

 were observed in ponderosa pine subtypes in all seasons but in 

 very low numbers. A significant percentage, 15 percent, were 

 observed on the agricultural creekbottom type during the fall 

 season. These antelope were on harvested hay meadows near 

 water . 



Activity : The activity of antelope at the time of observation 

 is recorded in Table 35. More antelope were observed standing 

 in the spring seasons, 34 percent in 1979 and 45 percent in 1980, 

 than the other four seasons which ranged from 22 to 28 percent. 

 The fewest numbers were observed running during the spring 

 season as antelope seemed to be conserving energy. The 

 relatively large percentage of antelope observed feeding and 

 lying down in the 1979 spring is indicative of the very 

 severe winter just completed. No antelope were observed lying 

 down or feeding during the winter aerial surveys. 



Use of topography : Antelope were most often observed in the 

 rolling portions of the dissected midslopes (Table 36) and 

 least often seen on steep mesa-butte hillsides. A few 



