- 
2055 30 10 20 30 9 10 20 30 9 19 29 9 19 
APR MAY JUN AUG SEP OCT 
17 
12 
4 
CENTRAL a 
a 
a 
2 
20 3 10 20 30 9 10 20 30 9 19 29 9 19 
APR MAY JUN AUG SEP OCT 
30 9 10 20 a 9 19 29 
20 10 20 9 19 
APR MAY JUN AUG SEP OCT 
r 2 
3- 24.—Migration seasons of Swainson’s thrush in different areas of the state (see Fig. 1) 
y count of each 2 days. Star symbols represent counts made in other years or by 
he state; lines without dots represent the eastern side. 
. Spring and fall graph lines (1967-1970) show the high- 
other observers. Dot symbols represent counts made on the western 
s (34 in the spring to 1 in the fall) and southern IIli- There are no published banding data to show destina- 
'4 in the spring to 1 in the fall). The paucity of fall tions of Swainson’s thrushes that pass through Illinois. Our 
its in west-central Illinois is a phenomenon which we only record was a bird banded at Almirante, Panama about 
Nany species. 2,000 miles south-southeast of Illinois on October 13, 1965 
25 
