Study of the Avi-fauna of Lake Erie Islands. 181 



terward it was present in considerable numbers and in all plum- 

 ages. It became decidedly common on August 23, and remained 

 common until we left. It was as numerous among the cedars as 

 elsewhere, and worked well down to the limit of vegetation on the 

 point. A few individuals were seen to fly toward Middle Island 

 during the day. 



Dendroica virens. — Black-throated Green Warbler. 



1910 only. The first was August 20, two ; the next, the 21st, 

 one; and on each day afterward, becoming common on the 31st, 

 remaining so to the end. We had reason to suppose that it might 

 be found breeding on this island since it breeds occasionally in the 

 river gorges of northern Ohio, but any evidence of breeding was 

 lacking. There were a few birds in nearly full spring dress, but 

 the most were in the juvenal plumage. None sang. 



Dendroica vigorsn. — Pine Warbler. 



At least one pair was found breeding, in 1910, upon our arrival 

 The male was singing, and continued to sing until the middle of 

 August. Both parents were seen carrying food into the top of 

 a dens-^ cedar tree. There was a distinct increase on August 24, 

 and the birds were more numerous than at first to the end of our 

 stay. 



Dendroica palmarum palmarum. — Palm Warbler. 



Found only in 1910. The first August 22, two ; the next, the 

 26th, one ; 2Tth, two ; 28th, three ; 31st, one ; September 1st, one. 

 They remained near the ground at all times, but did not seem to 

 be partial to the vicinity of the swamp. We expected to find more 

 of them. 



Dendroica discolor. — Prairie Warbler. 



Several were noted on August 18, 1908. The first seen in 1910 

 was on August 20. The complete records follow. August 20, 1 ; 

 27. 5 ; 28. 2 ; 30, 2 ; 31, 1 ; September 2, 2 ; 3, 2. It was usually found 

 along the borders of the cedars, or in the smaller cedars which 

 grew in the hollows between the ridges. Some were found at the 

 limit of vegetation on the point. Juvenal plumages prevailed, but 

 one bird was in full spring dress. 



Seiurus aarocapilliis. — Oven-bird. 



One was found on August 18, 1908. In 1910 it was evidently 

 breeding in close proximity to the swamp, in the deciduous woods. 

 From September 1 to the end of our stay it was decidedly common, 

 then ranging well into the cedars, and even roving down upon the 

 brush of the point. 



