69 
Birds of Paraguay. 
This young bird was shot in a swamp. It is very similar 
to that described by Dr. Bowdler Sharpe (Cat. B. Brit. Mus. 
xxiv. p. 82), but has the chestnut colour of the adult plumage 
just appearing. 
Ybytimi is twenty miles south-east of Sapucay, and a very 
similar district [ W ’. F.~\. 
21. POLYBORUS THARUS. 
Falco tharus Molina, Saggio St. Nat. Chil. p. 264 (1782). 
Caracard Azara, Apunt. i. p. 42. no. iv. (1802). 
Polyborus vulgaris Vieill. N. Diet. d^Hist. Nat. v. p. 257 
(1816, ex Azara). 
Polyborus tharus Sharpe, Cat. B. Brit. Mus. i. p. 31 
(1874) ; Berlepsch, J. f. O. 1887, p. 122 (Paraguay) ; 
Ihering, Revista Mus. Paulista, vi. p. 337. 
a. S ad. Sapucay, August 19, 1904. 
Cere and bare skin round the eye of a deep salmon- 
colour ; tarsi and feet yellow ; iris bright brown. 
[Resident and not uncommon in this district: it invariably 
goes in pairs all the year round. Its food consists almost 
exclusively of grasshoppers, frogs, and small snakes. I have 
never noticed any carrion propensities in the Paraguayan 
specimens. 
As the bird is never interfered with, it has become 
wonderfully tame, and horsemen can approach it to within a 
few yards : it will then fly quietly to one side.— W. F.~\ 
22. Milvago chimango. 
Chimango Azara, Apunt. i. p. 47. no. v. (1802). 
Polyborus chimango Vieill. N. Diet. d’Hist. Nat. v. p. 260 
(1816). 
Ibycter chimango Sharpe, Cat. B. Brit. Mus. i. p. 41 
(1874). 
Milvago chimango Hartl. Ind. Azara, p. 1 (1847) ; Ber¬ 
lepsch, J. f. 0. 1887, p. 122 (Paraguay) ; Sharpe, Hand-list 
B. i. p. 244 (1899); Ihering, Revista Mus. Paulista, vi. p. 337. 
a. d ad. Ybytimi, February 10, 1904. Bill, tarsi, and 
feet yellow ; iris clear light brown. 
