The fronds of the sensitive fern resemble somewhat the leaves of the oak-tree, and in some localities it is called the oak-leaf fern. It is found in damp, shady spots, and is one of the common ferns of New England. The delicate, light green leaves wither soon after being picked, and it is the first of the ferns to fall under the touch of Jack Frost.
May Ninth
A low, squeaking sound made with the lips is understood by some birds as a signal of distress. Orioles, wrens, catbirds, cuckoos, warblers, vireos, robins, and many other birds may be called close to one, particularly if the intruder is near their nest. You should learn this trick, for often it is possible to coax a shy bird from a thicket in order that it may be identified.
Notes
May Tenth
In summer the most common of our Northern wood warblers, yet one of the most difficult to see, on account of its liking for the tops of the tall trees, is the black-throated green warbler. Its song is a cheerful, interrogative, "Will you co-ome, will you co-ome, will you?" (Wright), or "a droning zee, zee, ze-ee, zee." (Chapman and Reed.)
May Eleventh
Why is it that the usually frisky and noisy red squirrels have become so quiet? If you could look into the nest of dried grass and bark, in a hollow tree-trunk, or a deserted woodpecker's nest, you would understand their reason for not wishing to make their presence known. Keep close watch of the opening, and some day you will see several little heads appear, and in a few days a family of squirrels will be scrambling about the trees. Pretty and graceful as these squirrels are, they do great damage by destroying the eggs and young of birds.