10 THE O. & O. SEMI-ANNUAL. 
For Red-eyed Vireo, it seems best to look for nests with eggs 
in. When I have found nests building, they have, in a majority 
of cases, been afterwards deserted. A careful search of the ends 
of drooping limbs in the neighborhood of an uneasy pair usually 
reveals a nest. 
Hummingbirds’ are found by watching the birds building and 
also by carefully searching whenever a female Hummer makes a 
good deal of fuss in one’s neighborhood. An agitated Hummer 
usually means a nest, but it does not always mean a nice, fresh set. 
Field Sparrows’ and Chats’ are found by searching in low bush- 
es and thickets, aiso by watching the birds building. Chipping 
Sparrows’ may be found by scrutinizing the ends of the long limbs 
of good-sized pines ; they nest more in such situations than any- 
where else. 
Acadian Flycatchers’ are found by careful search in the neigh- 
borhood of any pairs that seem disturbed or alarmed by one’s 
presence. 
For Blue Grosbeak’ one has to locate the territory a pair range 
over, and then search in all likely places for the nest. 
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