FAMILY FALCONIDAE 269 



base of the neck, a band that in some is united across the center ; rest 

 of under surface barred sparsely and irregularly with grayish black; 

 wing coverts white or buffy white; under surface of flight feathers 

 as in adult. 



An adult female taken, on February 28, 1964, at 1,350 meters on 

 Cerro Tacarcuna, Darien, had the iris dull orange ; bare skin on side 

 of head and the gape bright yellow ; cere dull greenish brown clouded 

 with fuscous; maxilla black except cutting edge back of nostril, 

 which is bright yellow changing to dull neutral gray on the project- 

 ing tooth ; tip of mandible dull neutral gray ; rest dull yellow ; tarsus 

 and toes bright yellow ; claws black. 



Measuremetits.— Males (8 from Panama), wing 158-167 (165), 

 tail 142-159 (151), culmen from cere 13.7-15.6 (13.9), tarsus 58.1- 

 64.8 (61.9) mm. 



Females (6 from Panama), wing 170-175 (172), tail 147-164 

 (155), culmen from cere 14.1-16.3 (15.6), tarsus 61.0-65.3 (63.1) 

 mm. 



Resident. Locally fairly common, in tropical and lower subtropical 

 zone forests, to 1,350 meters in the mountains; not recorded from 

 the eastern side of the Azuero Peninsula. 



This interesting member of its genus is fairly common in forested 

 areas, mainly along the Pacific slope, though its presence is detected 

 usually through its calls, as the bird is shy and is seldom seen. It 

 ranges to some extent in the lowlands but is more frequent in hill 

 country, probably because it is in such areas that suitable forest cover 

 still remains. I have found it especially over the lower mountains in 

 Chiriqui to 1,500 meters, and there are similar records for it in 

 Veraguas at Calobre and Calovevora (Salvin and Godman, Biol. 

 Centr.-Amer., vol. 3, 1901, p. HI). Formerly, when the lowlands in 

 these provinces were heavily forested, it ranged lower, as there is 

 one record for Divala (Bangs, Auk. 1901, p. 358), but suitable cover 

 in those areas has long been gone. I have recorded it on Cerro Cam- 

 pana and have found it regularly from the Cerro Azul to Darien. 

 Formerly it ranged through the Chagres Valley on the Caribbean 

 slope, where it was taken by McLeannan at Lion Hill a hundred 

 years ago and by Jewel at Agua Clara and Gatun in 1911 and 1912. 

 It was found on Barro Colorado Island in the period of Chapman's 

 studies but does not appear to have been recorded there since. The 

 only other report for it on the Caribbean side is of two taken by 

 Wedel near the Colombian boundary at Perme. 



