Taken in Monterey County 
THE CHAMPION 
Photo by the Author 
Authorities.—Lawrence ( Epkialtes choliba), Ann. Lyc. Nat. Hist. N. Y., vol. vi., 
1853, p. 4 (Sacramento); Brewster, Bull. Nutt. Orn. Club, vol. vii., 1882, p. 31 (orig. 
desc.; type locality, Nicasio); Bendire, Life Hist. N. Am. Birds, vol. i., 1892, p. 361; 
Emerson, Condor, vol. viii., 1906, p. 29 (red phase); Swarth, Condor, vol. xvii., 1915, 
p. 167 (Eureka; crit.), Bonnot, Condor, vol. xxiv., pp. 30, 31 (voice.) 
No. 216c Sahuaro Screech Owl 
A. 0 . U. No. 373L Otus asio gilmani Swarth. 
Synonyms. — Arizona Screech Owl. Formerly called Mexican Screech 
Owl. 
Description. — Adult: Somewhat similar to 0. a. bendirei, but much paler and 
grayer,—ashy gray tone sustained nearly throughout; under plumage heavily and 
finely mottled gray (with customary black streaks); the upper plumage slightly rufes- 
cent; the disc-feathers of throat somewhat modified, those of the middle broadly 
black-ribbed, those of the side with rib suppressed distally, and sharply cross-barred 
instead. Length of adults: 190.5-228.6 (7.50-9.00); male: wing 152.6 (6.01); tail 76.5 
(3.01); bill from cere 12.9 (.51); female: wing 156.5 (6.16); tail 75.1 (2.96); bill 13.5 
(-53)- 
Remarks. —This form represents the extreme in another line of divergence from 
0. a. ncevius, viz., the maxwellicE-aikeni-gilmani group. There is a hiatus between its 
range and that of bendirei (or quercinus Grinned), and there is no suspicion of inter¬ 
grading between them. 
This also is known as a monochromatic form, i. e., it has no recognized rufescent 
phase; but a specimen taken by Dr. Cooper at Ft. Mohave on the Colorado River in 
1861 (Mus. Vert. Zool. No. 4395) is decidedly warm in tone throughout, possibly the 
effect of fading. 
IIO4 
