MANN] 



BIRD-STUDY IN NORTHERN ILLINOIS 



203 



SUMMARY 



First feeding 7:35 a. m. (This would normally have occurred much earlier. 

 The birds had not become accustomed to the presence of the observers). 

 Last feeding, 7 :t,$ p. m. 



Feeding time, 12 hrs. (Normally about 15 hrs.) 

 Number of trips, 61. 

 Average time between trips, 12 min. 

 Longest time between trips, 35 min. 



