THE BIRD BOOK 
464 — 466 
464a. San Lucas Flycatcher. 
Empidonax difflcilis cineritius. 
Range. — Lower California. 
This species is similar to, but duller in plum- 
age than the Western Flycatcher. Their nest- 
ing habits do not probably vary from those of 
the latter. 
465. Acadian Flycatcher. Empidonax 
virescens. 
Range.— Eastern United States, breeding 
from the Gulf to southern New England, and 
in the Mississippi Valley to Manitoba. 
This species is very pale below and greenish 
yellow on the back. They are among the latest 
of the migrants to reach our 
borders and arrive in the 
Middle States about the lat- 
ter part of May, when they 
are quite common. They 
build semi-pensile nests in 
the forks of bushes or over- 
hanging branches at heights 
of from four to twenty feet, the nests being 
made of rootlets, fibres, fine grasses, etc., and 
partially suspended from the branch; they are 
quite shallow and loosely constructed and often 
appear more like a bunch of debris deposited in 
the fork by the wind than like the creation of 
a bird. Their three or four eggs are buffy, spot- 
ted or specked with brown; size .75 x .55. 
Buffy 
466. Traill’s Flycatcher. Empidonax trailli trailli. 
Range. — Western North America, from the Mississippi Valley to the Pacific; 
winters south of the United States. 
This species is very similar to the next, but the back is said 
to be more brownish. They are common and nest abundantly 
in thickets and low scrubby woods, usually placing the nest 
at a low elevation, preferably in a clump of willows; the nests 
are made of fine strips of bark, plant fibres, and very fine root- 
lets being woven about and firmly fastened in upright 
Creamy white crotches. Their eggs, which are laid in June, are buffy white, 
specked and spotted, chiefly at the large end, with brownish; sixe .70 x .54. 
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