tem tl Owes 
structure of 
theirown 
where 
spre ading 
branches of 
beech or oak 
or elm offer 
secure lodg- 
ment, close 
to the trunk 
Oram litue 
Woay i e- 
moved. In 
Gwar ssiien wea 
Crow’s nest 
is used its 
undesirable 
concavity is 
filled up with 
additional 
bark - strips, 
corn husks, 
Ont idmerarad 
leaves, so 
that the eggs 
of the Hawk 
occupy only 
a slight de- 
PES Sioa, 
Fresh eggs 
may be look- 
ed for about 
Photo by R. F. Griggs. 
ANOTHER NEST. 
the middle of April. Only one brood is regularly raised in a season, but in 
case the first eggs are destroyed the birds will make one or two more attempts. 
Incubation lasts about four weeks and is attended to by both birds. As the 
operation progresses feathers drop out increasingly from the birds’ breasts, 
so that a well feathered nest means eggs nearly ready to hatch. When dis- 
turbed the parent birds keep up a pitiful complaining, but usually from a safe 
distance. 
The eggs, varying in number from two to six, are among the best known 
of Hawks’ eggs and present interesting variations both in size, in shape, and 
