The amphibian abundance call frequency code system was adopted for 
     
     surveys of frog and toad calls, namely, 0 means none heard, 1 means 
     
     individuals can be counted with no overlapping calls, 2 means the 
     
     calls were distinguishable with some calls overlapping, and 3 means 
     
     a full chorus with calls continuous and overlapping. A survey 
     
     sampling system of three evenings, one each during the first two 
     
     weeks in May, the second two weeks of May, and mid-June was 
     
     established and a standardized survey form for calls and a separate 
     
     form for sightings (McAskill et a1, 1993) was created. Visual 
     
     observations were designated a code 4. 
     
    

    
     Newspaper, radio, and television releases were used to attract 
     
     volunteers to training seminars offered in eastern, central, and 
     
     western P.E.I. The training seminar utilized 35mm slides and 
     
     amphibian audio-cassette tapes to familiarize potential candidates 
     
     with amphibian identification and the survey techniques . A total 
     
     of 51 volunteers agreed to participate and we supplied them with 
     
     audio—cassettes of the known and potential species. 
     
    

    
     Two followup contacts were made with the volunteers. The first 
     
     provided survey sheets and 1:50,000 topographic road maps 
     
     (Anonymous, 1991) of their survey locations on which they were to 
     
     mark their survey points. The second provided life history 
     
     information on the species know to occur locally (McAskill, 1993). 
     
     A phone survey was conducted with all volunteers who had not 
     
     returned completed forms to ensure as many completed forms as 
     
     possible were obtained. A D-base IV database was designed to 
     
     analyze the data and to allow mapping of species abundance using a 
     
     computerized mapping system (Caris Geographic Information System 
     
     software). A location mapping system based on grid numbers called 
     
     the Universal Transverse Mercator Grid (UTM) number was assigned to 
     
     each point using the 1:50,000 maps returned with the forms. Where 
     
     a map was not available, the UTM was assigned using the site 
     
     location provided. 
     
    

    
     The sightings and acoustic records of staff from the Fish and 
     
     Wildlife Division, the P.E.I. National Park, and the Macphail Woods 
     
     Ecological Forestry Project were alSo transferred into the mapping 
     
     system for plotting. 
     
    

    
     The observations on frog and toad distribution and call 
     
     abundance with the exception of the green frog are displayed in 
     
     Figures 1 to 4. The highest level of call frequency is plotted in 
     
     each case as this represented the minimum population level present 
     
     at the site. Two survey groups reported hearing mink frogs (g; 
     
     septentrionalis) at two different locations. Unfortunately, these 
     
     records were not confirmed by either the collection of specimens or 
     
     the recording of the calls. 
     
    

    
     The results of the surveys expand the information available on 
     
     the distribution of spring peepers, wood frogs, and toads in Prince 
     
     Edward Island. The failure to record significant numbers of green 
     
     frogs and leopard frogs, even in habitats where they were known to 
     
     occur, appears to be related to the timing of the survey periods. 
     
    

    
     Few volunteers were willing to expend the extra effort 
     
     required to record water temperature and other environmental