• Drury, William H.
  
• Folger, David
  
• Conver, Garrett
  

The public in Maine will no longer acquiesce to spraying pesticides on

a major percentage of the forest area of northern Maine without searching

analysis and justification. In response to this, the Bureau of Forestry

commissioned a study of regional populations of songbirds, as one of the

studies needed to monitor effects on wildlife.

We used techniques developed by the U.S. Fish & Wíldlife Servíce for

assessing large-scale, long-term population trends in birds. Two observers

stopped at every half mile along twenty-three transects of 20 miles each"

At each stop the observers recorded all birds heard or seen during three

minutes. We discuss the advantages and limitations of the technique and

the major alternative

Because virtually all the areas of northern Maine in which spruce and

fir are the dominant trees were sprayed and all the unsprayed areas were

vegetated with hardwoods, our program lacked valid controls against which

to compare our data from sprayed areas. We found no differences between

the songbird populations along 300 miles of transects in sprayed areas and

those along 160 miles of transects in unsprayed areas.