FAMILY ACCIPITRIDAE 227 



Females, wing 325-370 (358.4), tail 213-243 (232.5), culmen from 

 cere 25-29 (26.7) , tarsus 80-92 (87) mm. 



Rare ; status not certain. 



The little that is known of this interesting species, which is found 

 elsewhere from southern Texas south through Mexico and Central 

 America to Colombia and western Ecuador, is embodied in 3 brief 

 records. Arce collected one in Veraguas (Salvin, Proc. Zool. Soc. 

 London, 1867, p. 158), that was recorded as from Santa Fe. From the 

 habit of the species elsewhere it is probable that it was taken in the 

 open country below, toward San Francisco. Bovallius secured a male 

 near Pacora on March 4, 1882 (Rendahl, Ark. Zool., Bd. 12, 1919, 

 p. 9). Hasso von Wedel collected a female near Almirante, Bocas 

 del Toro, November 24, 1927 (Peters, Bull. Mus. Comp. Zool., vol. 

 71, 1931, p. 310). It seems probable that the species in Panama is a 

 wanderer from elsewhere in its extensive range. 



In northeastern Columbia I have found these handsome birds in 

 open country where the savanna lands were interspersed with 

 scattered brush and low trees. The call is a harsh scream suggestive of 

 that of the red-tailed hawk. 



BUSARELLUS KIGKICOLLIS NIGRICOLLIS (Latham): Black-collared 

 HAWK; Gavilan de Cienaga 



Falco nigricollis Latham, Index Orn., vol. 1, 1790, p. 35. (Cayenne.) 



Adult, at rest marked by black breast band against the brown body 

 and white throat ; in flight the blackish wings show in contrast with 

 the brown body, and the breast band is prominent. 



Description. — Length 480 to 510 mm. Adult, head, including 

 throat and sides, white, with the crown washed with buff to cinna- 

 mon-buff, and blackish shaft streaks ; a black half-collar across lower 

 foreneck ; body, above and below, russet to chestnut-brown, with 

 heavy shaft-lines of black on back, upper and under wing coverts, 

 and tertials ; wings black, with faint cinnamon tips on secondaries ; 

 tail black, barred basally with rufous, and tipped with cinnamon-buff ; 

 a light spot that varies from white to cinnamon-buff at base of outer- 

 most primaries on under side. 



Immature, paler, more buffy on under surface, with indistinct 

 black shaft lines, and faint russet bars on the paler tibia ; upper tail co- 

 verts and secondaries dull russet, barred with black. 



Iris reddish brown; gape, including margins of both maxilla and 

 mandible, the bare bases of the mandibular rami, and the base of 

 the gonys, neutral gray ; bill and cere dull black ; tarsus and toes drab 

 to flesh color, with a tint of gray ; claws black. 



