CENTRAL 
OCT 
SOUTH 
| SPAN OF DATES 
10 
20 30 10 20 30 J 20 30 9 19 29 9 19 
APR MAY JUN AUG SEP OCT 
-8.—Migration seasons of gray-cheeked thrush in different areas of the state (see Fig. 1). Spring and fall graph lines (1967-1970) show the 
laily count of each 2 days. Star symbols represent counts made in other years, or by other observers. Dot symbols represent 
llinois; lines without dots represent the east. Dashed graph line (north) 
1875 and 1927 mainly in Du Page County, and shows the long-term peaks 
2 
counts made in west- 
represents the cumulative counts of birds made by Benjamin T. Gault 
and range of migration dates. 
