(Extracted from an MS by T. Moermond) 
FORAGING ZONES 
mae sparse Cluster i 
L- 
narrow surface ` 
/I\ x 
a N 
pote as 
o Y y 
vertical 
wide ae ; 
= | surface VN cS 
= 
UNO 
dense cluster 
peri 
de > A 
— 
horizontal 
wide surface 
