[Kinglets] are smaller than warblers and quite as restless in their motions, but arrive earlier in the migration;
[Wrens], with tails erect, slip mouse-like about brush heaps, crevices and bushes, though often perching in sight while singing;
[Thrushes], who with the exception of the [Robin] and [Bluebird] are very plainly dressed, run about on the ground stopping suddenly in a listening attitude. When singing they fly up to some perch, although many of the unrivaled singers of this family are silent during their brief sojourn in city parks;
[Vireos] are most at home on the boughs of trees and sing freely as they glide in and out among the leaves to feed.
Female birds can usually be identified after the adult males have been seen, although the females and young of many species are obscurely marked or quite different from the adult males, a fact especially true of the warblers. Immature birds are not considered in the present scheme of study since they are a source of confusion to the beginner and occur in any considerable number only during the fall migration.
The time of arrival, that is, when a bird may be expected during the migration, is a point worthy of particular attention. Many wild guesses may be avoided by simply noticing the dates when a bird has been known to arrive in any given locality from year to year.
As a rule birds are identified by the method of elimination. Suppose, for example, a small bird of lively motions is seen feeding among the twigs of a tree late in March. It is, of course, neither a warbler nor a vireo for these birds, although active and frequenting trees, arrive much later in the spring. Provided it does not brace its tail and climb up and around the trunk of the tree it is not likely to be a woodpecker, because the motions of woodpeckers are too characteristic to be mistaken. In similar manner, although sparrows and juncos may have arrived, it is probably neither of these since it does not feed upon the ground, while its size precludes the possibility of its being any bird larger than the English Sparrow. There are only a few birds therefore, which it might be and close observation together with the aid of a few leading hints, will usually settle the question. In any case watch the bird for it is better to look at the bird than at a printed description of it.
The safest way, however, is to make careful notes about a stranger on the spot. Memory is never more treacherous than in the case of the description of a doubtful bird when one appeals to some book of reference, a museum collection or the judgment of others. It is not advisable to attempt extensive “field-notes” at first but it is essential to keep a daily, dated list of all identified birds. A blank chart for this purpose is inserted in the back part of the book.
Never chase birds. Have patience, stand still a great deal and use your common sense all the time.
Do not make yourself believe that you see a certain bird because it has been reported by others. Do your own looking and listening and do it well.