CHERRIE: OR?-IITIIOLOGY OF THE ORINOCO REGION. 341 
Ibvcter ater (Vieillot). 
Daptrius ater Vieill., Analyse, 1816. pp. 22, 68. 
Ibycter ater Berlepscli & Hartert, p. iii. 
Not observed by the writer, but Beebe collected a specimen at 
Guanoco in the Orinoco delta. 
Berlepsch and Hartert record specimens from Temblador and from 
Nicare (Caura River). 
Ibvcter americ.\nus (Boddaert). 
Falco americaniis Bodd., Tabl. PI. Enl. 1783. p. 25. 
Ibycter americanus Berlepsch & Hartert, p. 112. 
Not uncommon about the rapids of Atures, and at Maipures. 
Colors from fresh birds are : eye carmine ; bill straw yellow ; cere, 
bare loral region and sides of lower jaw back as far as the rictus, 
plumbeous : bare skin around eye, cheeks and throat vermilion : feet 
vermilion. 
MiLVAGO CHIMACHIMA (Vicillot). 
Polybonis cinmachima Vieill., Nouv. Diet. V. 1816. p. 259. 
Mih'ago chimacliima Berlepsch. Ibis. 1884. p. 437 ( .\ngostura) ; 
Berlepsch & Hartert, p. 112. 
Native name "Chiriquari" (Chee-ree-qua-ree) or Garapatera. Not 
uncommon. An examination of the stomachs of several indicated that 
this species feeds largely on beetles and other insects, but is not averse 
to a diet of small fish ( !) and large ticks such as infest cattle are greedily 
eaten. This hawk is not infrequently seen perched on the backs of 
cattle. 
There is considerable variation in the colors of the fleshy parts 
about the head, due to age, sex and season. In nuptial plumage the 
colors seem to be : eye dark mummy brown ; bare skin about eye chrome 
yellow, blending into a sulphur yellow at base of maxilla and mandible; 
bill very pale blue ; feet pea green. 
Accipiter bicolor bicolor (Vieillot). 
Sparvius bicolor Vieill.. Nouv. Diet. X. 1817. p. 325, 
Cooperastur bicolor Berlepsch & Hartert. p. 112. 
Accipiter bicolor bicolor Hellmayr. N<n'it. Zool. XIII. 1906. p. 382 
(Caicara, Orinoco River). 
Not common. Noted at Altagracia, Caicara and Quirbana de 
Caicara in the thinly wooded savanna regions back from the river. 
Hawks of this species were usually seen hunting in pairs. 
