In the Delaware Valley and along the same parallel, this inconspicuous warbler is abundant, but north of New Jersey it is rare enough to give an excitement to the day on which you discover it. No doubt it is commoner than we suppose, for its coloring blends so admirably with its habitats that it is probably very often overlooked. Its call-note, a common chirp, has nothing distinguishing about it, and all ornithologists confess to having been often misled by its song into thinking it came from the chipping sparrow. It closely resembles that of the pine warbler also. If it were as nervously active as most warblers, we should more often discover it, but it is quite as deliberate as a vireo, and in the painstaking way in which it often circles around a tree while searching for spiders and other insects that infest the trunks, it reminds us of the brown creeper. Sunny slopes and hillsides covered with thick undergrowth are its preferred foraging and nesting haunts. It is often seen hopping directly on the dry ground, where it places its nest, and it never mounts far above it. The well-drained, sunny situation for the home is chosen with the wisdom of a sanitary expert.
Acadian Flycatcher
(Empidonax virescens) Flycatcher family
Called also: SMALL GREEN-CRESTED FLYCATCHER; SMALL PEWEE
Length—5.75 to 6 inches. A trifle smaller than the English sparrow.
Male—Dull olive above. Two conspicuous yellowish wing-bars. Throat white, shading into pale yellow on breast. Light gray or white underneath. Upper part of bill black; lower mandible flesh-color. White eye-ring.
Female—Greener above and more yellow below.
Range—From Canada to Mexico, Central America, and West Indies. Most common in south temperate latitudes. Winters in southerly limit of range.
Migrations—April. September. Summer resident.
When all our northern landscape takes on the exquisite, soft green, gray, and yellow tints of early spring, this little flycatcher, in perfect color-harmony with the woods it darts among, comes out of the south. It might be a leaf that is being blown about, touched by the sunshine filtering through the trees, and partly shaded by the young foliage casting its first shadows.
Woodlands, through which small streams meander lazily, inviting swarms of insects to their boggy shores, make ideal hunting grounds for the Acadian flycatcher. It chooses a low rather than a high, conspicuous perch, that other members of its family invariably select; and from such a lookout it may be seen launching into the air after the passing gnat—darting downward, then suddenly mounting upward in its aërial hunt, the vigorous clicks of the beak as it closes over its tiny victims testifying to the bird's unerring aim and its hearty appetite.