Bird^- Lore 371 



CC^Deeply hollowed, i to 3 inches deep 



D. In thickets or scrubby trees, under 3^ inches inside diameter 



1. Lining of leaves and rootlets .Catbird and Brown Thrasher 



2. Lining of bark and wool Migrant Shrike 



DD. In trees usually evergreen, over 3>^ inches inside diameter. . . Blue Jay 



VI. Felted Nests of Cottony Materials: 



A. Nests wider than high, containing thistledown Goldfinch 



AA. Nests higher than wide, no thistledown 



B. Thick walled, usually in vertical fork of bush or tree.. . . Yellow Warbler 

 BB. Thick walled, usually on horizontal branch of apple or similar tree usually 



decorated with bits of paper Least Flycatcher 



BBB. Thin walled, usually close to trunk of small sapling Redstart 



VII. Containing Layer of Mud: 



A. Built in trees 



B. Of grasses and mud, usually no moss, or dead leaves 



1. Under 4 inches inside diameter Robin 



2. Over 4 inches inside diameter Bronzed Crackle 



BB. Containing dead leaves and usually moss Wood Thrush 



AA. Built on buildings, bridges, or cliffs 

 B. Outer layer of grasses, mud within 



1. Under 4 inches inside diameter Robin 



2. Over 4 inches inside diameter Bronzed Crackle 



BB. Outer layer of mud, some grasses 



1. Open at top, cup-shaped Barn Swallow 



2. Open at side, gourd-shaped Cliff Swallow 



BBB. Outer layer of moss and mud Phczbe 



. VIII. With an Outer Covering of Lichens, Saddled on Branch 



A. Very small, less than i>^ inches outside diameter 



Ruby-throated Hummingbird 

 AA. Larger, over i >^ inches outside diameter 



1. Very deep, over i>^ inches Blue-gray Gnatcatcher 



2. Shallow, under i yi inches Wood Pewee 



IX. Mostly of Bark, Fibers, and Rootlets, With or Without Horsehair Lin- 



ing 

 A. Small woodland nests, usually in evergreens, less than 2 inches in diameter 

 (seldom found). .Pine Warbler, Magnolia Warbler, Black-throated 

 Green Warbler, Purple Finch, Blackburnian Warbler 

 AA. Small woodland nests, less than 2 inches in diameter usually in bushes or 

 sprouts 



1. No dead wood in botton Chestnut-sided Warbler 



2. Bits of dead wood in bottom Black-throated Blue Warbler 



AAA. Orchard or woodland nests, over 2 inches inside diameter 



B. Usually thin, flimsy structures 



1. Little or no lining, usually in high bushes 



Rose-breasted Grosbeak 



2. Considerable lining, usually in trees Scarlet Tanager 



BB. Thick, well-formed structures with some cotton or wool 



1. Shallow, about i inch deep Kingbird 



2. Deeper, about i>^ inches deep Cedar Waxwing 



X. Mostly of Grasses, Rootlets, Straws, and Leaves, Usually with Horse- 



hair IN THE Lining, and not Spherical 

 A. With manv leaves, placed in weeds, ferns, or low bushes 



1. Under 2 inches inside diameter Indigo Bunting 



2. Over 2 inches inside diameter 



a. Nest placed on mat of leaves Veery 



h. Leaves woven into nest Yellow-breasted Chat 



AA. With few or no leaves 



B. Less than 134 inches inside diameter 



1. With thick horsehair lining Chipping Sparrow 



2. With few hairs, or none Field Sparrow 



BB. Over 2 inches inside diameter 



1. With many or few hairs in lining Song Sparrow 



2. No hairs, a few leaves Yellow-breasted Chat 



