This variety differs from the last in having the under tail coverts pure
white. Its nesting habits are precisely the same and the eggs
indistinguishable.

[Illustration 291: 457-458.]
[Illustration: White.]
[Illustration: White.]
[Illustration: deco.]
[Illustration: right hand margin.]

Page 290

459. OLIVE-SIDED FLYCATCHER. _Nuttallornis borealis._

Range.--Whole of North America, breeding from the Middle States and
California northward, and in the Rockies, south to Mexico; winters south
of the United States.

These Flycatchers are nowhere abundant, and in some parts of the
country, especially in the middle portion, they are very rare. They
breed very locally and generally not more than one pair in any locality.
In New England, I have always found them nesting in company with Parula
Warblers, in dead coniferous swamps in which the branches are covered
with long pendant moss. Their nests are placed high up in the trees,
generally above fifty feet from the ground, and on small horizontal
limbs; they are made of small twigs and rootlets, lined with finer
rootlets and moss, and are very flat and shallow; as they are generally
made to match the surrounding, they are one of the most difficult nests
to find. They lay three or four cream colored eggs which are spotted
with reddish brown and lilac, chiefly about the large end. Size .85 x
.65. Data.--Lake Quinsigamond, Massachusetts, June 12, 1897. Nest of
twigs and moss, about 60 feet above the ground, in a dead pine tree in
center of a large wet swamp. Nest could not be seen from the ground, and
was found by watching the birds.

[Illustration 292: Olive-sided Flycatcher.]
[Illustration: Creamy white.]
[Illustration.]
[Illustration: left hand margin.]

Page 291

460. COUES'S FLYCATCHER. _Myiochanes pertinax pallidiventris._

Range.--Western Mexico, breeding north to central Arizona.

This Flycatcher builds one of the most artistic nests created by
feathered creatures. It bears some resemblance on the exterior to that
of the next species, but it is much more firmly made, and the walls are
usually higher, making a very deeply cupped interior. The outside of the
nest is made of fibres, cobwebs, catkins, etc., firmly felted together
and ornamented with green lichens to match the limb upon which it is
saddled. The interior is heavily lined with dried, yellowish grasses,
making a very strong contrast to the exterior. They are fairly abundant
birds in the ranges o