RAY-CHEEKED THRUSH (Catharus minimus) 
(Fig. 26 and 27) 
ring Migration 
The spring migration of the gray cheek is similar to 
t of Swainson’s thrush (Fig. 24 and 28). Both species 
erally begin to appear in late April and become common 
in early May. Records for northern Illinois on April 2 
(Bartel & Reuss 1932, and Bartel 1935a) are abnormal. 
Even records prior to April 20 are exceptional. By May 30 
nearly all of the gray-cheek population has passed north of 
the state (Fig. 28). In the south, arrivals around April 20 
are expected, and the population is virtually through the 
south by May 20. A specimen (Southern Illinois University 
g. 26.—Gray-cheeked thrush. (Similar in color to the Swainson’s thrush, but without “‘spectacles”’ or buffy face.) 
