To-day I discovered a nest in a birch stub directly 
in front of Gilbert’s cabin. It evidently contained young, 
for I saw one of the Chickadees enter it a number of times, 
bearing food in her bill. On one occasion she had a large 
green worm, I think the larva of the insect that feeds on 
the leaves of the white maple. It is possible, of course, 
that this Chickadee is a newcomer vAxo has lost her earlier 
nest (or nests); but more probable, I think, that she is one 
of the birds who reared their broods successfully last month 
in this same immediate neighborhood, although I have never 
heretofore suspected that the Chickadee is ever "two-brooded”. 
