IBYCTER. 129 
Falco americanus, Bodd. Tabl. Pl. Enl. p. 25°. 
Ibycter americanus, Scl. & Salv. Ibis, 1859, p. 214°; P. Z. S. 1864, p. 368°; 1870, p. 888°; 
Taylor, Ibis, 1860, p. 223"; Lawr. Ann. Lye. N. Y. vii. p. 288°; ix. p. 182°; v. Frantz. 
J. f. Orn. 1869, p. 867°; Salv. P. Z. S. 1870, p. 214%; Cat. Strickl. Coll. p- 508”; 
Sharpe, Cat. Birds Brit. Mus. i. p. 35%; Ridgw. Bull. U.S. Geol. & Geogr. Surv. i. 
p. 470"; Nutting, Pr. U. S. Nat. Mus. vi. p. 408%; Zeledon, An. Mus. Nac. Costa Rica, 
1887, p. 125°. 
Falco aquilinus, Gm. Syst. Nat. i. p. 280. 
Ibycter aquilinus, Cassin, Pr. Ac. Phil. 1860, p. 183%. | 
Niger, chalybeo nitens; pileo cristato: subtus quoque niger, pectore imo et abdomine, tibiis et subcaudalibus 
albis; subalaribus nigris: rostro flavo; cera pallide plumbea; mento vix plumato, lete aurantiaco ; 
palpebris nudis saturate aurantiacis ; pedibus saturate aurantiacis, unguibus nigris; iride aurantiaca. 
Long. tota circa 21:5, alee 15:1, caudee 10-0, culm. (cum cera) 1°45, tarsi 2°2. (Descr. maris ex Savana 
Grande. Mus. nostr.) 
$ haud a mari distinguenda ; pectoris lateribus paullulum albo mixtis. Long. tota circa 22:0, ale 15:3. 
(Descr. femine ex Savana Grande. Mus. nostr.) 
Hab. Guatemaa (Constancia ™), Pacific coast-region 4, Savana Grande (0. 8. & F. D. G.), 
Retalhuleu (fichardson); Honpuras, San Pedro (Whitely*), Taulevi (Taylor) ; 
Nicaragua, Los Sabalos (Nutting ”); Costa Rica, San José (Calleja 14, Carmiol®), 
Peje (Carmiol), Guaitil, Guanacaste (v. Frantzius 10), Jiménez, Tacares de Alajuela, 
Pozo Azul de Pirris (Zeledon 1%), Talamanca (Gabb™); Panama, Chiriqui, Mina 
de Chorcha (£. Arcé!"), Lion Hill (If*Leannan® 8), Turbo (Wood 18).—Tropicat 
SouTtH AMERICA. 
This species is well known as an inhabitant of Tropical South America, and ranges 
as far north as Guatemala. Here we found it on the Pacific coast, to the forests of 
which the bird is apparently confined. It frequently occurs in collections from Costa 
Rica and Panama, but Mr. Nutting procured only one specimen in Nicaragua. On the 
Isthmus of Panama, Lieut. Wood found the species abundant in the neighbourhood of 
Turbo, though less numerous in the interior; he remarks that it is always seen in 
trees. . 
This bird utters a very disagreeable note, which we have frequently heard in the dense 
tropical forests of Guatemala: it may be well expressed by the word “cacao,” uttered 
with the first syllable reiterated several times. The cry is emitted by the bird when 
sitting on a branch, and the tail is expanded with a jerk on the utterance of each 
note. ‘The species may be generally observed in pairs, seldom singly, though some- 
times several individuals are seen in company. 
The late George Cavendish Taylor’ relates an amusing experience of this Hawk 
in Honduras. He calls it the “ Curassow” Hawk, from its similarity to these game- 
birds, both in appearance and flight. Late one evening, as he was returning to his 
home in Taulevi, his companion pointed out five black birds sitting on a tree, and after 
much trouble in reaching the spot he killed one of them. Without waiting to pick it 
up he pressed on through the jungle, and stalked the other birds, securing three out of 
BIOL. CENTR.-AMER., Aves, Vol. III., Apri/ 1901. 17 
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