Vol. 20, No. 8 
Page 3 
for the second year—from 3-7 in 1975 to 10.9 in 1976 and to 11.3 this year. 
The number of hatched eggs per clutch increased from 9.6 in 1975 to 10.5 in 
1976 and to 10.8 in 1977- 
As previously noted (MWRL 18(9):4), it appears that success of the hatch 
must be about 50 percent to maintain a stable population. On that basis and 
from the other favorable indications, we expect the population of prairie 
chickens at Bogota next spring to be very near or above the count of 75 cocks 
made this past spring. 
