52 



USEFUL BIRDS. 



gitation. The parent birds swallow the food, and probably 

 soften or partly digest it, ejecting it afterwards through their 

 own mouths into the open mouths of the young. No attempt 

 was made, therefore, in this case, to determine the character 

 or amount of the food, for fear of disturbing the parents and 

 interrupting the regularity of the feeding. The birds were 

 fed between 7 and 8 A.M. four- 

 teen times; between 8 and 9, 

 nine times ; between 9 and 10, 

 twelve times ; between 10 and 

 11, seven times; between 11 

 and 12, sixteen times ; between 

 12 and 1, nine times ; between 1 

 and 2, twelve times ; between 



2 and 3, fifteen times ; between 



3 and 4, thirteen times ; and be- 

 tween 4 and 5, eighteen times. 



It will be seen that one or 

 the other parent came to the 

 nest Avith food one hundred and 



Fig. 24. -Passenger Pigeon feeding twenty-five times in ten hoUl'S, 

 by regulation. From Samuels. eyen when the observei . was 



Avatching near by ; but this leaves four hours unaccounted 

 for, to fill out the long June day, from daAvn to evening. 

 The feeding periods averaged less than six minutes apart dur- 

 ing the time the birds Avere watched ; so it seems probable 

 that, had the entire record for the day been kept, at least 

 one hundred and fifty visits to the young Avould have been 

 recorded. Young birds are fed oftenest at morning and even- 

 ing, or during the hours Avhen these Vireos Avere not watched. 

 Mr. Mosher Avatched a pair of Rose-breasted Grosbeaks 

 feeding their young on June 12, 1899. The young Avere 

 nearly ready to leave the nest, as one of them stood on a 

 branch near its edge. The nest Avas situated about fifteen 

 feet from the ground, in the top of a slender Avhite birch in 

 the Avoods. The ground Avas Avell covered with hazel bushes 

 about three and one-half feet high, which nearly concealed 

 the observer. During the first half hour he made no record, 

 as the birds were alarmed by his presence. As they com- 



