NORTH 
EGG LAYING- (Span of dates) 
20 
| | 
BIRDS COUNTED PER DAY 
io 20 30 fe) 440) %\9) 9 
APR MAY 
probably due to the fact that study periods cover time 
during which the least flycatcher is migrating. This is 
certainly true of Finley's (1917) report which lists this bird 
as a summer bird at Normal but has recorded it May 
5-11. The paucity of least flycatcher records in 
northwestern Illinois (Fig. 40) may only reflect 
inadequate exploration. 
44 
| Empidonax 
CENTRAL 
JUN JUL AUG 
ey ys] 9 (Sees lO g20 
JUN JUL AUG 
Nesting Habitats and Populations 
The least flycatcher in Illinois is a bird of the ecot¢ 
forest edge, and places of similar form such as open sh 
areas, parkland, well-planted residential areas, and 
the past at least, orchards. The only actual measurem 
of a least flycatcher population in Illinois was tha 
