34 EGG CHECK LIST OF NORTH AMERICAN BIRDS. 
405a. Western Horned Owl—suBo VIRGINIANUS SUBARCTICUS. Same — 
as those of the preceding species and the nesting habits are the same. 
(See Notes.) 3 
406. Snowy Owl—nyvcTEa scanpiacaA. White, oval-oblong, with very 
smooth surface; three or four; 2.25 by 1.85. Nests placed on the 
ground. N. «Ne JAG 
407. American Hawk Owl—suRNIA FUNEREA. White, spherical; six 
or seven; 1.50 by 1.20. Nests in holes of trees or on the branches. 
N. N. A, 
408. Burrowing Owl—sPEOTYTO CUNICULARIA HYPOGHA. Pure white, 
nearly round; four to seven; 1.22 by 1.05. Nests placed in holes in the 
ground, but they are not always excavated by the birds, as the name would 
indicate. W.. U.S; 
412. White Gyrfalcon—HIEROFALCO GYRFALCO CANDICANS. Varying 
from a creamy-white to yellowish-brown, profusely sprinkled with reddish- 
browh of varying shades, usually so dense as to almost conceal the ground 
color; two to four; 2.45 by 1.75. Nests in rocky cliffs. N. N. A. 
413. Prairie Falcon—HIEROFALCO MEXICANUS POLYAGRUS. Cream or 
*pinkish-white, marked with blotches of chestnut and reddish-brown, more 
or less confluent at either end; two to four; 2.25. by 1.75.. Nests placed 
on rocky cliffs. W. N. A. 
414. American Peregrine Falcon; Duck Hawk—FraLco PEREGRINUS 
Nz&vIus.. Creamy-white to reddish-brown, spotted, dotted and blotched 
with reddish-brown and chocolate of varying shades, sometimes so thickly 
covered as to Obscure the ground; two to four; 2.25 by 1.75. Nests 
placed on rocky cliffs. N. A. 
-417. Pigeon Hawk—a:saLon COLUMBARIUS. Varying from a whitish _ 
to a deep reddish-brown, spotted, dotted and blotched irregularly and 
usually very thickly with reddish-brown of varying shades; four to six; 
1.80 by 1.25. Nestson rocky cliffs, branches and in holes of trees. _N. Ass 
420. Sparrow Hawk—TINNUNCULUS SPARVERIUS. Reddish, or light 
buff, blotched and dotted with light and dark brown, at times confluent 
enough as to conceal the ground; five;_ 1.35 by 1.13. Nests in holes of 
trees, either in natural cavities or those made by woodpeckers. N., A. 
423. Caracara Eagle — po_yBorus CHERIWAY. Yellowish-white or — 
creamy, blotched, spotted and sprinkled with reddish-brown of varying 
shades; two to four; 2.40 by 1.90.. Nests in trees and bushes. — : 
Middle America—Southern border of U,S. 
