560 Field Museum of Natural History — Zoology, Vol. IX. 



Genus ICTERUS Biisson. 



229. Icterus spurius (Linx). 



Orchard Oriole. 



Distr.: Whole of eastern United States, west to the plains and 

 southwest through Texas, Mexico, and Central America to Panama. 



Adult male: Whole head, throat, upper breast, and most of back, 

 black; rest of under parts, and rump and upper tail coverts, chestnut; 

 wings and tail, dark brown, more or less tipped with brownish white. 



Male. 



Orchard Oriole. 



Female. 



Adult female: Upper plumage, dull olive yellow, faintly tinged 

 with grayish olive on the back; under parts, yellow; wing coverts, 

 edged and tipped with dull white; tail, olive yellow. 



Immature male, first year: Resembles adult female, but back more 

 grayish brown. 



Immature male, second year: Similar to adult female, but throat, 

 black, and with or without patches of chestnut on the under parts. 



Length, about 6.75; wing, 3.20; tail, 2.80; bill, .62. 



The Orchard Oriole is a common summer resident in Illinois and 

 southern Wisconsin at least as far as Dunn Co., and according to 

 Kumlien and Hollister it occasionally occurs as far north as the shores 

 of Lake Superior. Its delightful whistling notes are uttered more 

 rapidly than those of the Baltimore Oriole and are somewhat sharper. 



