PLATE XViil 
THE USE PER ACRE OF ALL POTHOLES 
TYPES BY BREEDING PAIRS 
POTHOLE 
TPE, V0 

noNS 
NO DIVING DUCKS 

M4. —C6$—CWRCRREG QQ yg. 
2 SM ™—~—C «WiC COE E6Ff 
b A IW 
NO DIVING DUCKS 
g_|NO RIVER DUCKS 
3INO DIVING DUCKS 
p,|NO RIVER DUCKS 
~4NO DIVING DUCKS 
_ (Ig ,.W’W’W’'Wi 
NO DIVING DUCKS 
DMD65D5pDCMPD£G 
0 o2 04 06 O8 10 12 14 (16 
| PAIRS PER ACRE 
WY RIVER DUCKS (76 PAIRS) 
FE] DIVING DUCKS (I5 PAIRS) 
