10 THES AVULDU BON: BUS LD bie 
ce, In evergreens, (usually) 324.0 420s Blue-headed vireo 
d= Intmiddletofetree...-. eee on eee ee Yellow-throated vireo 
e. -In tree top or outer branches. 3523.0 - une Warbling vireo 
2. Small, semi-pensile, partially supported...Acadian flycatcher 
3. Larger, over 2 inches deep inside: 
a. Of dried grasses, sometimes partially supported........ 
OE Sevan aa eie RO Vk a erah sh ae eee Orchard oriole 
b.. Of fibers) (strings, and the like... 22) ee Baltimore oriole 
IV. IN HOLES IN TREES OR IN BIRD-BOXES: 
A. Nesting vin rcoloniesian ss tt. as. ee ee Purple martin 
B. Nesting singly: 
1. Drilling holes, no nest at bottom: 
da) Openinesabout 1 72 inches...) 40.) ee Downy woodpecker 
6.5 Opening about 1 2. inches. 1... el eee Hairy woodpecker 
cr Openinevaboute2einchesss-ce ee ae Red-headed woodpecker 
dee Overs Ziinchess yee Flicker, red-bellied woodpecker 
2. Using old woodpecker holes or natural cavities of the same size 
or bird-houses with similar openings, building a nest at bottom 
OLSCAViLy neste eee Flying squirrel, white-footed deermouse 
a. Nest of sticks, lined with feathers... . 2... oe 
sett at hl ae House wren, Bewick’s wren, Carolina wren 
b. Nest entirely of grasses. ........°... 7) eee Bluebird 
c. Nest of straw and feathers: 
Nest cuplike, open above. .4...4. + eee Tree swallow 
Spherical or partially arched....English sparrow, starling 
d. Nest of fibers, moss, wool, feathers. ..Chickadee, nuthatch 
e. Nest with many leaves... ..).....2.).4 oe 
eee ants. .......Tufted titmouse, prothonotary warbler 
f. Nest usually containing a cast snake skinw...3..0) eee 
nin ale bie geld Seats + Oetaieie Rieke Bete enna Crested flycatcher 
3. Using flicker holes or natural cavities of similar size, no nest 
built*. 2 4 ee ee Sparrow hawk, screech owl, saw-whet owl 
4. Using larger natural cavities.........))) eee 
Rr i A ee Barn owl, barred owl, horned owl, wood duck 
V. CONTAINING STICKS OR LARGER TWIGS: 
A. Bulky nests in trees, 16 to 60 inches outside diameter: 
1. Very large, 30 'tot60e. 7-2 eee eee Osprey, bald eagle 
2. smaller, no lining) flat. 7: ...-....0...) 22a Herons 
%. Hollowed, lining ‘of bark:...........:.0) 5 eee 
Pres PSE Ck 14 F Crow, great-horned and long-eared owls 
4. Hollowed, lining of fresh leaves or evergreens.............. 
. .Red-shouldered, red-tailed, Cooper’s, sharp-shinned hawks 
5. Spherical ~ nests... 2 0.) a oe Squirrels 
B. Smaller, less than 15 inches outside: 
1. Cuplike, in hollow trees, chimneys or silos. ...Chimney swifts 
2. Otherwise: 
a. Platform, very shallow: 
Notliningy.. S354 ek ae ee ee Mourning dove 
A: hittle dining: . 0.2.7 es. oe Cuckoos 
b. Deeply hollowed, 1 to 3 inches deep, in thickets or scrubby 
trees, under 3% inches inside diameter: 
Lining of leaves and rootlets, over 3 inches inside...... 
band ts Ae ene ee Mockingbird, brown thrasher 
© inches or léss insides, «1.5.3. 2) Catbird 
Lining of sbarkeand wool sean eee Migrant shrike 
In trees, usually evergreen, over 3% inches inside 
diameter?..4.; 40.2 ee Blue jay 
VI. FELTED NESTS OF COTTONY MATERIAL: 
A. Nests wider than high, with thistledown.............. Goldfinch 
B. Nests higher than wide, no thistledown: 
