I56 BIRDS OF THE REPUBLIC OF PANAMA PART 2 



the outer webs barred with cinnamon-buff, and the inner webs 

 usually plain. 



Gray phase : lighter, buffy brown above ; lighter below, with the 

 base color of the lower breast and abdomen white, and the paler 

 markings buff. 



Young, down basally buffy white, tipped with white, barred nar- 

 rowly with dull cinnamon, the barring broader and more widely 

 spaced than in Otus gtiatemalae vermiculatus. The first stage is 

 followed immediately by a second juvenile plumage that above is 

 cinnamon-buff, brighter on the crown, duller on the back, barred with 



Figure 23. — Foot of bare-shanked screech owl, buhito en pernetas, Otus clarkii, 

 showing partly feathered tarsus. 



dull fuscous-brown ; below buff, tipped with white, and barred indis- 

 tinctly with dull fuscous. 



A male that I secured on Cerro Mali, Darien, March 3, 1964, had 

 the iris bright yellow; top of cere and tips of maxilla and mandible 

 dull light honey yellow ; rest of cere pale dull brownish gray ; rest of 

 bill dull greenish neutral gray; bare area of tarsus dull brownish 

 white; toes dull yellowish white; claws black, with the bases dull 

 brownish white. Another male, captured in a mist net at 1,980 

 meters on the west base of Volcan Baru, Chiriqui, March 5, 1965, had 

 the iris clear yellow ; bare rim of the eyelids black ; cere buffy brown ; 

 bill pale dull green ; lower end of tarsus and toes pale buffy brown : 

 claws like toes, except that the distal half on top was dull black. 



Measurements. — Males (9 from Costa Rica and Panama), wing 



