14 IOWA STUDIES IN NATURAL HISTORY 



3:20 P. M. Insect Ad. feeds 3 



juvs. (leaves 



at once) 

 3:31 p. M. Insect 6 feeds 1 juv. By same Swallowed by 6 



juv. as fed 

 3:34 p. M. ? 2 feeds 1 juv. 



(leaves at 



once) 

 3:48 p. M. ? Ad. feeds 1 By 1 juv. Ad. leaves with ex- 



juv. crement in bill 



4:02 p. M. ? 6 feeds 1 juv. By 1 juv. Swallowed by 6 



4:03 p. M. ? 2 feeds 1 juv. 



4:08 p. M. ? 6 feeds 1 juv. By 1 juv. 6 flies away with ex- 



crement in bill 

 4:35 p. M. ? 2 feeds 1 juv. By 1 juv. Swallowed by 9 



4:41 p. M. ? 6 feeds 2 juvs. 



5:52 p. M. ? Ad. feeds 1 



juv. 

 5:53 p. M. ? 2 feeds 1 juv. 



5:55 p. M. ? 6 feeds 1 juv. l^y 1 juv. 6 flies away with ex- 



crement in bill 



General Remarks on Table V 



The observations on this date were made between 7:05 and 

 11 :05 A. M. and between 3 :00 and 6 :02 p. m. during which pe- 

 riod the young were fed thirty-nine times. As before, the male 

 usually announced his arrival at or near the nest by a low trilL 



Under the caption "excreta sac removed by 6 " the observer 

 was not sure whether the excreta was swallowed or simply re- 

 moved. In some cases the adults flew away with the excreta 

 sac in the bill. Whether it was subsequently swallowed was 

 not ascertained. 



The nestling fed at 9 :09 was one of the three that had been 

 fed by the male at 9 :07. It still seemed that the parents used 

 little selection or discrimination in feeding the young. At 9 :16 

 the nestling first fed was the one that had been neglected at the 

 two preceding feedings. 



At 3:25 both parents were away from the nest and the nest- 

 lings were apparently suffering from the heat. Neither adult 

 was at the nest between 4:43 and 5:52, an unusually long- 

 absence. 



