The main objective of this project was to determine if sonagrams could be used to assess the number of different birds using a single woodcock singing ground. Earlier work showed that individual male woodcock could be distinguished by their peent call. Weather permitting, two singing sites near Morgantown, West Virginia, were monitored every other day from April 3-28, 1972. Birds using the sites were recorded and voice prints (sonagrams) were made of the peent call. "T' test comparisons of frequency and width of the peent sonagram showed only one bird using each site. However, one bird was mistnetted at the singing site on April 18 and no further calling occurred until April 26, Based on voice prints, this was a different male. Management implications and technical problems are discussed.