A solitary wanderer, nevertheless one cuckoo in an apple orchard is worth a hundred robins in ridding it of caterpillars and inch-worms, for it delights in killing many more of these than it can possibly eat. In the autumn it varies its diet with minute fresh-water shellfish from the swamp and lake. Mulberries, that look so like caterpillars the bird possibly likes them on that account, it devours wholesale.

Family cares rest lightly on the cuckoos. The nest of both species is a ramshackle affair -- a mere bundle of twigs and sticks without a rim to keep the eggs from rolling from the bush, where they rest, to the ground. Unlike their European relative, they have the decency to rear their own young and not impose this heavy task on others; but the cuckoos on both sides of the Atlantic are most erratic and irregular in their nesting habits. The overworked mother-bird often lays an egg while brooding over its nearly hatched companion, and the two or three half-grown fledglings already in the nest may roll the large greenish eggs out upon the ground, while both parents are off searching for food to quiet their noisy clamorings. Such distracting mismanagement in the nursery is enough to make a homeless wanderer of any father. It is the mother-bird that tumbles to the ground at your approach from sheer fright; feigns lameness, trails her wings as she tries to entice you away from the nest. The male bird shows far less concern; a no more devoted father, we fear, than he is a lover. It is said he changes his mate every year.