648 BULLETIN 203, UNITED STATES NATIONAL MUSEUM 



were all well hidden in sphagnum moss, or green tree moss, on hum- 

 mocks, old stumps or fallen logs; two were in a wet swamp and less 

 than a foot above water. The nests were well inside the concealing 

 moss with an entrance about 2 inches wide; one nest measured 41/^ 

 inches in outside diameter, 21/^ in inside diameter, and 1^^ inches in 

 inside depth. 



Miss Cordelia J. Stanwood (MS.) describes a nest she found near 

 Ellsworth, Maine, placed in a rather open situation on the ground 

 between a moss-covered stump and the roots of a gray birch. "The 

 outside was composed of leaves — poplar, dwarf cornel and gray birch — 

 with the addition of the inner bark fibre of such young dead trees as 

 poplar, soft maple, and willow, and also a few white pine needles, 

 several decayed fern stipes, and a number of skeletonized leaves. 

 The lining consisted of minute threads of inner bark fibre and a few 

 black horsehairs. Aside from the large, dry leaves on the outside, 

 the stuff of which the structure was composed was fine, even minute, 

 in texture." 



Of the nesting of the Canada warbler in western Pennsylvania, 

 W. E. Clyde Todd (1940) mentions situations such as those described 

 above and adds : "R. B. Simpson, who has found many nests in War- 

 ren, reports that they are also placed under the projecting banks of 

 streams and among the ferns and moss on the sides of large rocks and 

 ledges. One nest referred to by Burleigh was built in a mass of dry 

 leaves at the base of a huckleberry bush ; the brim was flush with the 

 ground. Wherever located, the nest is a more or less bulky, formless 

 structure; it is composed of dry (often skeletonized) leaves, shreds of 

 bark, dry grass, and weed stalks, with a lining of finer vegetable 

 fibers, among which the black rootlets of the maidenhair fern {Adian- 

 tum) are a conspicuous element." 



T. E. McMullen has sent me the data for eight sets of eggs, found 

 in the Pocono Mountains, Pa. ; two of these were in upturned roots, 

 two in rotten stumps, one 3 feet up on the side of a 10-foot creek bank, 

 and the others were on the ground, one of which was among 

 rhododendrons. 



I found my first and only nest of the Canada warbler in Bridge- 

 water, Mass., on June 9, 1924. While walking through some mixed 

 moist woods, mostly white pines with a few oaks and other deciduous 

 trees, near a swampy place, I flushed the warbler from its nest almost 

 under foot; it was in plain sight at the foot of a clump of brakes 

 {Pteridium aquilinum) ; the nest contained three fresh eggs; two 

 days later, I photographed the bird on its nest. The nest, 

 now before me, is rather bulky and loosely made externally of dry 

 and skeletonized leaves, coarse strips of weeds and inner bark, stems 

 and fronds of ferns and weed tops; it is lined with very fine plant 



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