192 The Wilson Bulletin—No. 97 



9:45 A.M. — 2 amelanchier berries 5:15 P.M. — 3 blue berries 



9:55 A. M.— 2 blue berries 5:28 P.M.— 2 cherries 



10:06 A. M.— 2 blue berries 6:00 P.M.— 3 cherries 



10:41A.M. — 2 pin cherries 6:02 P.M. — 2 blue berries 



10:45 A.M.— 1 cherry 6:45 P.M.— 2 blue berries 



11:40 A.M. — 2 cherries 7:20 P.M.— 2 blue berries 



11:59 A.M.— 3 blue berries 7:52P. M.— 1 cherry 

 12:05 P.M.— 2 blue berries 



As accurately as could be observed the birds ate forty-two 

 pin cherries, thirty-nine blue berries and twelve amelanchier 

 berries. I picked the same number of these of average size 

 and found them to weigh seventeen grams. The birds were 

 not given any other food. On many occasion during the day 

 a parent bird brought food up to the cage and flew away with- 

 out leaving it. At first we thought that the bird was fright- 

 ened at something, but the repetition of the performance on 

 occasions when we could discover no cause for fright con- 

 vinced us that the parent was trying to get the young to 

 leave the cage and when its efforts failed it came back and 

 fed the young. The juvenals were active during the day; they 

 seemed to be on the perch less than on the day before. They 

 became excited when a butterfly flew past, and one tried to 

 catch a fly which came within the cage. They rubbed their 

 bills in the sand and also against the side of the cage. They 

 also preened their feathers a great deal and flapped their 

 wings. As nig'ht approached they gradually became less act- 

 ive, although they were fed at 7 :52, when it was quite dusk. 

 At 8 :15 they were asleep on their perch. 



After this we kept the birds in the cage for eleven days and 

 observed them- each day for eight days, but there was little 

 change in their behavior. The parent birds became accus- 

 tomed to the cage and would bring food even lif someone 

 were so close that he could have touched the birds by stretch- 

 ing out a hand. Nevertheless the young birds became more 

 excited at every feeding and beat their wings against the cage 

 in their efforts to get away. The last few days the old birds 

 stopped feeding them, but came to the cage once every day as 

 long as we observed. The juvenals seemed well and lively 

 durinsf their entire time in the cage. 



