FAMILY ACCIPITRIDAE 2^9 



qualities found in the osprey, as in its fishing it becomes water soaked 

 on the legs, and at times on the body. 



The Penards (Vog. Guyana, vol. 1, 1908, pp. 401-402) state that 

 in Surinam this species breeds principally during the season of heavy 

 rains. The nest, of small sticks, may be located in high trees, though 

 near the coast it may be placed at lower elevations in mangroves. The 

 nest may be used for several years, when it may become very large 

 as the pair add more material to it annually. The eggs, one, seldom 

 two, in shape are bluntly oval or rounded. The ground color varies 

 from dull whitish or yellowish to a bluish or greenish tint, with spots 

 and blotches of cinnamon, reddish brown, and lilac-gray, the pattern 

 varying from almost plain to heavily marked. The average size is 59 

 by 45 mm. Kreuger (Ool. Rec, 1963, p. 6) gives a similar descrip- 

 tion of a set of two taken on the Demerara River, British Guiana, 

 April 2, 1927. These measured 58.2 x 45.2 and 56.2 x 45.2 mm. 



BUTEOGALLUS URUBITINGA (Gmelin): Greater Black Hawk; Cocolino 



Like the lesser black hawk in color, but base of bill and cere gray ; 

 larger ; legs longer. 



Description. — Length 510 to 590 mm. Adult, dull black throughout, 

 with a faint slaty cast, and indistinct dark-gray markings in the form 

 of shaft lines in crown, edgings on back, and broken bars on pri- 

 maries and secondaries ; feathers of nape white basally ; tibia and 

 edge of wing barred narrowly and irregularly with white ; underside 

 of wing dull black, except for faintly indicated gray bars. 



Immature, brownish black above and on sides of head, with crown 

 and hindneck streaked and edged with cinnamon-buff, this color form- 

 ing an indistinct superciliary streak; back, wing coverts, and sec- 

 ondaries edged indistinctly with cinnamon; upper tail coverts buff; 

 tail brownish black, barred, narrowly and irregularly, and mottled, 

 with brownish gray to white, changing to cinnamon-buff on inner 

 webs; below cinnamon, whiter on the throat, streaked and spotted 

 with dull black ; tibia white, barred irregularly with black, underwing 

 buff to cinnamon-buff, spotted on the under coverts, and tipped on 

 the axillars, with dull black; primaries and secondaries tipped with 

 brownish black, and barred narrowly and irregularly with the same 

 color. 



In what appears to be a second-year plumage, the buff is paler, 

 often white, and the black markings on the undersurface are much 

 more extensive; above mainly dull black, except for white to buffy 

 white streaks on the head; tail tipped broadly with black, barred 

 narrowly, and mottled, with the same color. 



