The Robin 211 
but on May second the serious business of incubation 
began. In this the female took the most active part, 
being relieved about an hour and a half each day by 
the male, and with one exception she covered the 
eggs at night, although there was no apparent reason 
why the male should have assumed the responsibility 
on this particular night. Sometimes the male brought 
food to the female while she was on the nest. 
On the eleventh day after incubation began, the 
first young robin appeared, and two days later the 
other three eggs were hatched. The young birds 
grew very rapidly, and in twelve days were ready to 
leave the nest. During the time the young were in 
the nest the old birds constantly took food from the 
board, particularly worms. The young robins were 
quite tame at first, but, as time went on, gradually 
grew wilder, and finally disappeared altogether on 
June fifteenth. We often saw the female about the 
house, and the first week in July the old nest was used 
again for a second brood, which was reared without 
accident. 
There being no distinguishing marks on the male, 
he was lost sight of on August twentieth. The female 
was last seen on September twenty-sixth. The dis- 
appearance of the old birds ended the observations for 
the year. The results had been successful beyond 
