U. S. NATIONAL MUSEUM 



BULLETIN 133 PL. 20 



Shining Cowbirds 'Molothrus b. bonariensis' Warming Their Toes 

 ON A Cold Winter Morning. These Birds Alight Fearlessly on 

 Domestic Stock 



Las Palmas, Chaco, .July 13, 1920 



Nest and Eggs of Misto Sicalis a. arvensis) 



Carhue, Buenos Aire.';, December IS, 1020 



