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which has been structurally strengthened with truck tires, has created an extensive pool, in which the resident beaver have built one bank, and two typical mud and stick lodges. In the study area there has been a welcome change in the cross-sectional profile of the gully, going from a classic, unstable V-shaped profile to a more stable V-shaped configuration. The mud bars which have developed behind the dams are providing excellent sites for vegetation establishment and riparian recovery, and hopefully, will lead to a more permanently stabilized gully and channel. In only two years, the study site on Sage Creek appears to be stabilizing as a result of the beaver activity and the abundant riparian vegetation establishing through- out the gully bottom. Willow recovery has been very good in this unfenced study area. It appears that while rest from grazing was achieved with an electric fence on Currant Creek, rest on Sage Creek was achieved in a cur- ious and somewhat surprising manner. The pools and mud bars created behind the dams, which stair-step the length of the study area, effectively blocked the traditional trailing of livestock up and down the creek. Therefore, fencing may not necessarily be needed to rest riparian areas with a gully profile similar to Sage Creek. An important feature of the study is to determine the response of wild- life (birds, mammals, reptiles, amphibians, and fish) to the improved habitat conditions at the study locations. The bulk of the monitoring work to date has occurred at the Currant Creek area. In mid-June, songbird transects were established and run both inside and outside of the exclosure on three consecutive mornings. Two mallard nests were found near the stream and one marsh hawk nest was located. Bird species diversity seems to have increased following habitat improvement with 21 species identified within the exclo- sure (Apple 1983). Although no bird surveys were made prior to the begin- ning of this study project, the species diversity outside the exclosure more likely represents the pre-exclosure condition than the species diver- sity inside the exclosure. With the development of ponds with relatively still water conditions behind the beaver dams on Currant Creek, hopefully, more waterfowl and other water bird species will make use of this area in the years to come. There are several species of mammals using the area along with the beaver. Although no mammal surveys have been conducted, ob- servations from sightings or from sign indicate that muskrats, deer, long- tailed weasels, cottontail rabbits, Richardson's ground squirrels, Northern pocket gophers, deer mice, coyotes, and antelope are using or have used the area. A fish survey conducted in 1980 (Richards and Holden 1981), prior to construction of the exclosure, indicated that in the vicinity of the exclo- sure only mountain suckers were collected. After the exclosure was completed, a 500 foot length of Currant Creek was monitored monthly from May through November to determine species occurrence, composition, and any associated changes which might take place throughout the season (Apple 1983). Brown trout were collected on each day monitored from May through November. Sixty percent of these fish had a clipped adipose fin indicating that they had previously been stocked by the Wyoming Game and Fish Department into Flaming Gorge Reservoir. Rainbow trout were collected on each of the May through August surveys. Being described as spring spawners in inlet streams 32