other information suggest that late migration and unusually 
long retention of leaves as the result of warm weather, 
rather than poor reproductive success, accounted for the 
poorer shooting in 1961. 
The ratio of immatures per adult female in the continent- 
Wide kill, weighted by State kill estimates, suggested an 
increase of 6 percent from 1960 to 1961 (1.8 and 1.9 immatures 
per adult female). The weighted number of immatures per adult 
(adult males and females combined) was 1.1 in both years. 
The findings of the Wing Collection Survey thus suggest 
no significant change in woodcock reproductive success from 
1960 to 1961. This conclusion is tantative, however, since 
age ratio and kill data were not available for all States 
and Provinces where woodcock are shot. Furthermore, relia- 
bility of kill estimates used for weighting is not known 
and the distribution of the kill in 1961 may have differed 
from that in 1960. Nevertheless, results of the Wing 
Collection Survey suggest that population size of woodcock 
in the spring of 1962 would have remained unchanged from 
1961, unless an unusual amount of mortality occurred. 
This conclusion is supported by the findings of the 1962 
Singing Ground Survey, which indicated no significant 
change in the number of woodcock from 1961 to 1962. 
mie 
