BIRDS OF NORTH AND MIDDLE AMERICA 423 



c. Upperparts mottled with grayish; abdomen unbarred. 



d. Breast white like rest of underparts M. guianensis, imm. (p. 425) 



dd. Breast dusky grayish hair brown, contrasting with white abdomen. 



M. guianensis, subad. (p. 425) 

 cc. Upperparts not mottled with grayish; abdomen with faint rufescent bars. 



M. guianensis, ad. (p. 423) 



MORPHNUS GUIANENSIS (Daudin) 



Guiana Crested Eagle 



Adult male. — Forehead and superciliary margin of crown white 

 sHghtly washed with pale pinkish buff; crown, auriculars, and nape 

 smoke gray, the feathers tipped with dirty pinkish buff and becoming 

 darker on the occiput and nape where they are mostly drab instead of 

 smoke gray; a black postocular streak separates the sides of the 

 occiput from the auriculars; occipital crest plumes black, tipped with 

 dirty buffy white and very broadly white basally (about three-fifths 

 of their length); scapulars, interscapulars, and back black with a 

 blue-slate cast; lesser upper wing coverts like the interscapulars but 

 tipped with white (the white tips often slightly flecked with hair 

 brown) ; median upper wing coverts dirty white washed with light 

 drab and flecked with hair brown and crossed on their distal (exposed) 

 halves by three broad chaetura black bands; greater upper primary 

 coverts blackish with a bluish or greenish sheen, fading to hair bro\^^l 

 and to whitish on the (concealed) inner web ; greater upper secondary 

 coverts like the median ones; secondaries fuscous-black very narrowly 

 tipped with grayish white, subterminally blackish, and paling toward 

 the base on the inner web to whitish much freclded with fuscous, 

 some of the freckles resolving themselves into irregular bars on the 

 outer secondaries; primaries externally blackish, hair brown on the 

 inner webs paling to white basally, the inner webs broadly tipped 

 with blackish and crossed by two black bands anterior to this in the 

 distal half of their length; rump and upper tail coverts like the back, 

 but conspicuously tipped with white ; rectrices pale smoke gray crossed 

 by four very broad black bands (the black bands broader than the 

 gray interspaces), narrowly tipped with pale smoke gray, the inter- 

 spaces mottled with darker, the feathers narrowly whitish basally; 

 chin and middle of throat white; sides of throat and cheeks washed 

 with pale ashy buff; lower throat and breast dark smoke gray with a 

 faint wash of hair brown; abdomen, sides, flanks, thighs, and under 

 tail coverts white, sometimes washed with pale buffy, and barred 

 narrowly with cinnamon to sayal brown, the bro\vn bars much 

 narrower than the white interspaces and usually palest on the under 

 tail coverts, darkest on the thighs; under wing coverts almost pure 

 white, very sparsely and faintly barred with very pale cinnamon; 

 under side of wing whitish where gray above; bare loreal space blackish 



