Reproduction 
Set 
Nest, building began (nest B1) 
Fig. 7. Mean and minimum daily tempera 
Ithaca, New York, with a tabulation 0 
Prairie Horned Lark during the mon 
o 
eo 
(cessnow(on ground et 7.00 P, M.) 
T \ A 
© 26 27 28 29 30 31 
4 
’ 
’ 
A 
9 2D 21 2223 B42 
18 19 
completed, incubation began 
6 17 
1 
First egg laid 
eT Ce Cen hk eh et 
4 
3 
2 
ac 
ee Ee 
tures for March, 1927, at 
f breeding activities of the 
