streams and in the trees of villages and cities.

As we go north the number of warblers increases, till, in the northern
part of New England, and in the Canadas, as many as ten or twelve
varieties may be found breeding in June. Audubon found the black-poll
warbler breeding in Labrador, and congratulates himself on being the
first white man who had ever seen its nest. When these warblers pass
north in May, they seem to go singly or in pairs, and their black caps
and striped coats show conspicuously. When they return in September
they are in troops or loose flocks, are of a uniform dull drab or
brindlish color, and are very fat. They scour the treetops for a few
days, almost eluding the eye by their quick movements, and are gone.

According to my own observation, the number of species of warblers
which one living in the middle districts sees, on their return in the
fall, is very small compared with the number he may observe migrating
north in the spring.

The yellow-rumped warblers are the most noticeable of all in Autumn.
They come about the streets and garden, and seem especially drawn to
dry, leafless trees. They dart spitefully about, uttering a sharp
chirp. In Washington I have seen them in the outskirts all winter.

Audubon figures and describes over forty different warblers. More
recent writers have divided and subdivided the group very much, giving
new names to new classifications. But this part is of interest and
value only to the professional ornithologist.

The finest songster among the Sylvia, according to my notions, is the
black-throated greenback. Its song is sweet and clear, but brief.

The rarest of the species are Swainson's warbler, said to be
disappearing; the cerulean warbler, said to be abundant about Niagara;
and the mourning ground warbler, which I have found breeding about the
head-waters of the Delaware, in New York.

The vireos, or greenlets, are a sort of connecting link between the
warblers and the true flycatchers, and partake of the characteristics
of both.

The red-eyed vireo, whose sweet soliloquy is one of the most constant
and cheerful sounds in our woods and groves, is perhaps the most
noticeable and abundant species. The vireos are a little larger than
the warblers, and are far less brilliant and variegated in color.

There are five species found in most of our woods, namely the red-eyed
vireo, the white-eyed vireo, the warbling vireo, the yellow-throated
vireo, and the sol