FALCO FUSCO-C^RULESCENS 17 



Personally, I have never known this Eagle feed on carrion 

 or kill a bird. It appeared to me to prey exclusively on rodents. 

 A pair commonly frequent the exact same place — perching close 

 together on some projecting ledge of a cliff or bare limb of a tree, 

 whence they contemplate the prospect in dignified repose. 



In appearance, whether at rest or on the wing, these birds are 

 magnificently aquiline — wheeling, and scouring the land in quest 

 of prey ; working by poise without a wing's beat for as long as 

 one watches them ; calling to one another from a distance. 



Harmless as I found them in the bird world, they undergo 

 much annoyance from the Carancho and Chimango. 



The Ona name is '"'' KavarehT 



FALCO FUSCO-CiERULESCENS (Vieillot) 

 Alconcillo aplomado, A. obscuro azulejo, Azara, Pdxaros, 



Paraguay y La Plata, i, pp. 175, 179, 1802. 

 FalcO fuSCO-CSeruleSCenS, Vieillot, Nouv. Diet. d'Hist. Nat., xi, p. 90, 



1817; Sharpe, Gat. Birds Brit. Mus., i, p. 400, 1874; Sclater and 



Hudson, Argentine Orn., ii, p. 69, 1889. 

 FalcO femoraliS, D'Orbigny, Voy. Amer. Merid., Ois., p. 116, 1835 j 



Gould and Darwin, Voy. " Beagle," Birds, p. !^8, 1841. 



Hypotriorchis femoralis, Durnford, ibis, p. 398, 1878. 



Habitat. — North America from Mexico, througliout South America, to 

 Tierra del Fuego. 



? , Cheena Creek Settlement, 22nd Jan., 1905. 



Iris — brown ; bill — grey, dark points ; legs — greenish yellow. 



Few expeditions record the Orange-chested Hobby. 



" Aunque no abunda," says Azara, " no faltan parejas en 

 todos estos paises. En quanto a sus costumbres solo resta anadir, 

 que suele acompanar d los viageros y cazadores que andan por 

 el campo, voltejeando para perseguir y pillar los paxaritos y 

 Inambus que levantan. Es tan raro, que no he visto sino uno 

 que compre en el Paraguay." 



3 



