DELAWARE VALLEY ORNITHOLOGICAL CLUB. 31 



fork three feet from the trunk, and it held four young about 

 three days' old. These young, birds I removed, and substituted 

 for this nest an old nest of a Towhee which I had found just 

 before ascending. 



This Black burnian Warbler's nest is before me now. It is 

 composed principally of hemlock twigs interwoven with dry 

 grass, plant fiber, rootlets, one or two leaf stalks and a tiny dry 

 leaf. On the exterior are several pieces of plant down, spider 

 web and fur. The lining is of fine grasses, slender strips of 

 plant fiber, several stiff white hairs and a few very slender, 

 black fern stalks. The outside diameter of the nest is four 

 inches; the inside diameter is two inches. The nest is well 

 cupped; the inside depth is about an inch and a quarter. The 

 general appearance is like that of a Magnolia Warbler's nest,, 

 but it is much more substantially built. 



The tree in which this nest was built was not more than fifty 

 feet from the tree in which I had found the Black burnian 's 

 nest containing young during the previous June. Another 

 point of similarity is the fact that the first nest was only two 

 feet farther from the. ground than the second. It seems very 

 probable that these two nests were built by the same pair of 

 birds, and although for two years I had found the nest of these 

 Warblers I was unable to secure a set of eggs. 



In June, 1910, I again made Pike County my objective point, 

 and on the 13th I was once more at the spot where for two sea- 

 sons I had found the Blackburnian' s nest. At first not a bird 

 of this species was to be found; even the Mourning Warbler was 

 not in sight, and I missed his spirited song. Suddenly I be- 

 came aware of the faint, persistent chirping of some bird in the 

 foliage overhead, and I realized at once that the note was that 

 of a Blackburnian Warbler. 



In order to confirm my judgment I began at once to look for 

 the bird, but it remained hidden in the upper part of the forest 

 canopy. Not a glimpse of it could I catch, and I was almost 

 ready to sit down at the foot of a tree and watch for the bird 

 when my upward gaze was arrested by something in the foliage 

 directly overhead, which upon more careful scrutiny proved to 

 be a nest. It was small and near the trunk, and for some rea- 



