In reading the history, or in watching the proceedings of birds and insects, how many remarkable instances do we meet with of that which may be called _manufacture_, though performed without hands! How curious to watch in the early spring the proceedings of those busy basket-making birds, the rooks! Rude and clumsy as their nests may at first appear, it is just the sort of workmanship best calculated for their wants. They do not, indeed, choose the smooth and flexible osier-twigs which we should think necessary for basket-making, but they contrive by means of brittle, dead, forked sticks, to plait together a strong bristling out-work, within which they interweave a finer basket-work of fibrous roots, rude indeed, but not inelegant or unsuitable. Then, among birds and insects too, what persevering and industrious carpenters, masons, tailors, miners, and weavers may we not find. Perhaps there are not many persons who have watched the mason-wasps boring their galleries in brick or sand, or building the round towers which serve them as out-works; nor the mason-bee, as she plasters together her neat mud-wall cottage or cell, as the future habitation of her young; but there are few persons unacquainted with the masonry of the chimney swallow, or of the house-martin twittering on the eaves. With no other tools than those which nature supplies, how cleverly do these creatures shape and mould their nests into the required form, using for their work a mortar carefully prepared by their own labour and skill, and just of the consistency required. Few, again, may have had an opportunity of seeing carpenter-bees boring holes in posts or palings, and forming their smoothly chiselled cells, or of inspecting the partitioned galleries dug out in old timber by carpenter-wasps; but perhaps many persons have observed the colonies of emmets, or carpenter-ants, working in the trunks of decaying oak or willow trees; or they may have listened to that interesting carpenter-bird, the wood-pecker, tapping and boring into trees, in pursuit of insects, and for the purpose of making a nesting-place for its young. Most of us know only by hearsay that there are tailor-birds, common enough in American orchards, who sew together broad pieces of grass to make their nests, working them through and through, as if actually done with a needle; but almost every one can say from his own knowledge, that there are weaver-birds, such as our common hedge-sparrow and chaffinch, who weave a circular piece of haircloth for the interior of their nests, each hair being collected and interwoven singly, and always bent so as to lie smoothly in the hollow of the nest. Then who shall describe all the wondrous proceedings of tent-making caterpillars, upholsterer-bees, turret-building ants, net-making spiders, paper and card-making wasps, and spinning worms? Volumes have been written, and volumes might still be written on the history of these creatures.