□ - 1-15 April 
0“*6-31 April 
O* 0 birds 
©- 1-10 " 
0-11-25 ■ 
0*26-50 ■ 
O*50-100 * 
#-101-500* 
■500+ 
APRIL 
SI-MNH-38 (Riv. 9-65) 
