inches 
Reproduction 
at 8.00 P, M.) 
—— 
_——_ 
— 
See 
i 
-—— 
-. 
a 
- 
ae ae 
V1. snow (en ground 
! 
a 
-—. 
- 
- 
Piret eggs laid (nests no. 1 and 2) 
Nest building began 
or 
© 
27 28 30 
24 26 2 
t ' , qT 
tT 
qT 
9 £0 it 193 49 144 15 16 1718 19 
On ie 
i 
' 
a ° a - sa 
Fig. 5. Mean and minimum — temperatures and snow on the 
ground at 7:00 P. M., 
at Evanston, Ill, with a 
6, 
; or rch, 192 
tabulation of be breeding aaieition of the Prairie Horned Lark 
during the mon 
