44 BIRDS OF LA PLATA 



The second species of the three known to me is 

 the Blue Tanager, Tanagra sayaca, the entire plumage 

 of which is a pale glaucous blue. A few of these 

 birds migrate as far south as Buenos Ayres and are 

 seen in small parties of four or five in the woods on 

 the shores of the Plata* The male emits a series of 

 squealing sounds by way of song. 



The third species is the Blue-and- Yellow Tanager, 

 Tanagra bonariensis. The plumage is rich blue above 

 and bright yellow beneath. The female is olive green 

 above and buff colour beneath. This species also 

 visits Buenos Ayres in small numbers in spring 

 (October). Both sexes have a long reedy call-note, 

 and the male has a song composed of a succession 

 of sounds like the bleating of a kid. 



There are eleven more species of Tanager in 

 Argentina, all confined to the northern part of the 

 country. 



GLAUCOUS FINCH 



Guiraca glaucocxrulea 



Uniform glaucous blue ; wings and tail blackish, the feathers edged 

 with light blue ; length 5.7 inches, 



THE Finches in Argentina number about fifty species 

 and belong mostly to forms peculiar to the New 

 World, the chief exception being the genus Chry- 

 somitris (Siskins), which has perhaps the widest 



