Table 25. Comparisons of observer estimates of adults versus 

 nest counts at 11 gull colonies in Massachusetts, June 1977, 



Adult estimate 



Colony 



Nest count 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 



26 

 79 

 93' 



180 

 190^ 

 213 

 313 

 398^ 

 491 

 1,873 

 2,680 



Counts based on marked, sample quadrats in colonies, 



48 



