446 APPENDIX. 



(c.) Nest on the ground, or very near it. 



1. Av. 1.80X1.35. Occasionally marked. Marsh Hawk. 27, I. 



2. Av. 1.50X1.30. Normally, almost spherical. Short-eared Owl. 26, II, B. 

 (3.) Av.l.20X.90. Blue-tinged, and nearly elliptical. Least Bittern. 



4. Av. 1.20X1.00. White, often stained, and almost pointed at one end. Quail. 31. 



5. Av. .70X.55. Usually marked. Nest built near water. Yellow Throat. 9, II, A. 



(<J.) Nest about buildings (2, 3, 6, usually in bird-boxes, 4 in chimneys). 

 (1.) > 1.50X1.25. Impure white. Barn Owl* 26,1. 



2. >.85X.65. Purple Martin. 11, V. 



3. <.80X.60. White-bellied Swallow. 11, HI. 



4. Av. .70X.40. Chimney Swift. 21, 1. 



5. Av. .75X.57. Nest built on beam, or under eaves. Pewee. 19, III. 



(6.) Av. .80X.60. Usually blue. Bird with chestnut breast. Bluebird. 2, I. 



(e.) Eggs laid in a burrow in a bank of sand or sometimes gravel. 



1. > 1.25X1.00. Kingfisher. 23,1. 



2. <1.00X.75. Bank Swallow. 11, IV. 



(/.) Nest built among reeds, or in tall meadow-grass. 



1. Eggs small and brittle. Short-billed Marsh Wren. 7, II, A. 



(g.) Nest very bulky, and built of sticks on cliffs. 



(1.) >3.00x2.25. Impure white ; usually marked. Golden Eagle. 27, VII. 



B. Color, blue, bluish green, or greenish blue, dark in "5 " only, 

 (a.) Nest made in trees (or bushes). 

 (1.) 2.25X1.75 or more. Extremely light. Occasionally marked. Goshawk. 27, IV. 



2. Av. 1.15X.85. Bird with reddish or dun breast, unmarked. Robin. 1, I, F. 



3. 1.00X.70 or more. Bird's breast thickly spotted. Tail, dusky olive. Wood Thrush. 

 1, I, A. 



4. Av. .85X.60. Bird, soft reddish brown above, slightly spotted beneath. Wilson's 

 Thrush. 1, 1, B. (Nest generally on the ground.) 



5. Av. .90X.65. Dark emerald green. Nest often in thicket. Catbird. 1, II, B. 



(6.) .95X.65. Light blue, cf, dark blue ; ?, warm brown and flaxen. Blue Grosbeak.^ 

 15, XXI. 



7. 1.15X.87. Usually dull. ( Nest loose and frail. ) Black (-billed ) 24, I, B. 



8. Av. 1.25X.87. Rather light. I Eggs long or elliptical. J Yellow \ Cuckoo. J 24, 1, A. 



(b. ) Eggs laid in a hollow tree or post, or in a bird-box. 



1. Av. .80X.60. Bluebird. 2, I. 



(c.) Nest made on the ground. 



(1.) Av.<.75X.55? Nest made in dry fields. Black-throated Bunting. 15, XIX. 



2. > .75X.55. Nest made in wet woods, etc. Wilson's Thrush. 1, I, B. 



(d.) Nest about buildings. 



1. Av.l.l5X.85. Robin. 1, 1, F. 



[NOTE. There are many Herons' eggs of the above color, but they are all > 1.25 long. 

 There are also many white eggs, tinged with blue (or green), and perhaps among them should 

 be included those of the Goshawk and Cooper's Hawk. Many Ducks' eggs are strongly tinged 

 with blue, green, drab, or yellowish. Most of them are laid on the ground or in hollow trees, 

 but all are more than an inch and three fourths long. The only Ducks commonly breeding in 

 Massachusetts are the Dusky Ducks, who build on the ground, and the Wood Ducks, who 

 build in hollow trees.] 



* There is no authentic record of the breed- t There are no good reasons for believing 

 ing of the Barn Owl in Massachusetts. that the Blue Grosbeak has ever bred in Mas- 

 W. B. sachusetts. W. B. 



