188 The Wilson Bulletin — No. 89 



moths ; when the female fed the young she twittered sint, 

 sint, sint. 



At this stage the young twittered faintly when the birds 

 came, gave a vigorous food reaction, preened a great deal and 

 yawned. They had yellow beaks, brownish at the tip, throats 

 lined with red, greenish-grey upper parts, wings darker than 

 the back, two buffy-yellow wing-bars, buffy-yellow under- 

 parts, and almost invisible streaks on the breast. Most of the 

 time the young rested their beaks on the rim of the nest, at 

 other times they raised them at an angle of 60°. 



The parent birds had formed a habit of walking out the 

 branch to the west side of the nest, but when both birds came 

 at the same time, the male sometimes came to the north side 

 of the nest and the female to the east. 



The following morning I was present at the blind from 7 

 a. m. to 11 :11 a. m. — four hours and eleven minutes. Dur- 

 ing this time the parent birds fed the young once in seven 

 and one-half minutes. The male brought food thirteen times, 

 and the female sixteen times. On the bill of fare I saw one 

 fly-like insect, one bee-like insect, one beetle similar to the 

 larder beetle, ten smooth green caterpillars, eleven smooth 

 brown caterpillars, one white moth and three brown moths. 

 The morning was very wet and foggy. The young are more 

 hungry at this time of day, and usually more caterpillars and 

 fewer moths are served, I suppose on account of the damp- 

 ness. 



The eyes of the young looked intelligent ; one called when 

 the parent left the nest ; they all snuggled down in the nest 

 when I moved in the blind. 



In the evening I spent an hour in the blind. At 7 :25 

 the female fed the young. I remained in the blind until 8 

 P. M. It was so dark in that part of the woods that the nest 

 ceased to be visible. I saw nothing more of the parent birds. 



Two days later the young were still in the nest in the morn- 

 ing. At noon the little grove was deserted and the nest of 

 the Black-throated Green Warbler was " To Let." 



