20 The Oologists' Record, March 1, 1923. 



bird, which also contained an egg of the Cowbird, I was attracted 

 by the Worm-eaters attacking a Cowbird on the opposite side of 

 the ravine. The Cowbird was on the ground and coming toward 

 me as I sat near the nest-site. I moved farther away. The Cow- 

 bird continued to approach the nest-site, and seemingly in be- 

 wilderment, examined the pocket in the side of the bank from which 

 I had just removed the nest. Undoubtedly, a bird on its way to 

 deposit a second egg, but it carried no egg in its beak. 



Louisiana Water-Thrush : watched a female Cowbird enter a 

 nest of this bird, turn round and remain in half standing position 

 for several minutes. With the four eggs of the Water-Thrush was 

 one laid by the Cowbird. 



Kentucky Warbler : the most interesting case I have. 



On June 1st, 1907, I found an exposed nest of this Warbler in 

 a clump of mayapple plants in undergrowth woods on hillside, and 

 containing two eggs of the owner and one of the parasite. On 

 June 4th, as I approached on my second visit, I heard both old 

 Kentuckys chirping excitedly. In nearing the nest-site I had to 

 cross a fence, and while at this elevation I could see the nest 

 surroundings, 30 feet away, and there upon the groiind was a 

 Cowbird walking about after the manner of a Crow. The Kentuckys 

 were not attacking, but mere scolding from the lower tree branches. 

 The Cowbird espied me and passed beneath the foliage, out of signt 

 but the opportunity to observe its further doings was accepted by 

 me. Backing off the fence, but not obscuring the nest with a small 

 space of surroundings, I awaited the retvirn of the skulking Cowbird, 

 which was nearly forestalled by the old Kentucky going upon the 

 nest. Her anxiety, however, was more toward me than the hiding 

 Cowbird, so I was offered the opportunity of seeing the Cowbird 

 again come into sight, and after searching about uneasily found 

 the nest and hopping upon the edge walked across the brim, then 

 she turned round and seemed to settle well down into the nest. 



Quietly leaving my position to locate the nest of an anxious 

 Hummingbird, I was absent about ten minutes, but upon my return 

 saw that the Cowbird was still on the nest. A moment later I 

 climbed upon the fence, whereupon the Cowbird left and flew off 

 through the thicket. Five eggs of the Warbler and two of the 

 Cowbird were in the nest. The eggs of the latter are quite similar, 

 except that one has the majority of the markings on the larger 

 end, while its companion is marked chiefly on the smaller. 



