Reproduction 
4s 
buckwheat /s \ hay meadow // 
As oe en nee 
ar See if Y { road 
Araya | Cc 3 
cece garden | B hay meadow 
\ j 
| 
~ 
meh Cte ey 9 neste 
1 LY 
iifrthy | | 
0 
| 
! 
| 
| moe 
weed patch N\ 4 
| y \ 
i \ Ks 
a \ \ % fall wheat ; } 
wu wa \ cs , 
een Pegi °o 
ae oa "Manet J 
=< ~ zy 
a ee ny, ip ‘A % 4 
if my a uf 4f 
! = * ~*~ > 
1é § pF 5S 
j © fallwheat 3 = \ 
Waste ground H r - z \ Ny 
Weed patches Vf jz 3 Ny | 
ty y a sh jv 
: =! 
: ZV 
% 97 x 
etn us 
a 
200 yards scale 
Fig. 2. The territories of Prairie Horned Larks A, B and C in March 
and April at Ithaca, New York. 
Boundaries of territories seemed to be limited, in a general 
way, only by the size of the suitable area and by the number of 
males attempting to possess it. Thus, at Evanston, where the 
