i ™ 800 
500 
»- 
MIGRATING 
200/HR 
300 
100 
10 20 i. ae 9) 
FEB MAR APR MAY JUNE 
600 
‘ a 
2 CENTRAL 
400 
> 
< 
Oo * - 4 
ac EGG LAYING 
SeeEZ00 
ra) 
a 
*¥ 
= ¥y 
O e 
bt 10 20 10 «6 (20:«30'si si‘ 29 
a FEB MAR APR MAY JUNE 
a¢ 
o 500 _ 1570/HR 
MIGRATING — 
t 
280/HR 
T sours 
300 
100 EGG LAYING (SPAN OF DATES) 
10 20 TY ee en 
FEB MAR APR MAY JUNE 
Fig. 4.—Egg-laying and migration seasons of the robin in different areas of the state (see Fig. 1). Spring and fall gra 
(1967-1970) show the highest daily count of each 2 days (left scale). The lines are interrupted where data have not been collect 
symbols represent counts made in other years or by other observers. Shaded areas show the percent of eggs laid on a given date (rig 
or the span of dates during which egg laying has been recorded. Dot symbols represent counts made on the western side of the sté 
without dots represent the eastern side. Arrow symbols indicate dates of actual migration flights and the number of birds seen per ho 
