and the truant was again soon perched upon his hand, although it was followed by one of the wild birds to within six feet of the place where he stood. Seeds of many kinds--but principally those of trees--young buds, tender leaves, and, during the breeding season, caterpillars and various insects, constitute the ordinary food of these birds, the nestlings being fed exclusively upon the latter diet--caterpillars, aphides, &c. It is for this reason that the parent birds often frequent gardens and orchards, accompanied by their young, such localities affording a larger supply of insects than is to be met with in the forests. When in captivity a little seed and a few green weeds will satisfy all their requirements. [Illustration: GOLDFINCHES AND NEST.] The Siskin seeks its mate in April, obtaining her favour by very much the same efforts as those practised by the Cross-bills, the male bird, at such times, looking much larger than it really is, spreading its wings, and wheeling around her at a considerable height in the air, and at the same time singing vigorously. During this courtship the female remains quite quiet, only from time to time caressing her companion with her beak, or making short excursions in his company. Occasionally many of these little couples will join company, and live in the utmost peace and unity. The building of the nests begins shortly after the pairing of the birds, and all must admire the cunning with which the female selects a suitable spot, and fully appreciate the popular idea that a Siskin's nest is invisible. The locality fixed upon is generally the extreme end of a thick, lofty branch, the foliage of which entirely conceals the little domicile. Fir and pine-trees are frequently selected for nidification, and so perfectly does the exterior of the nest resemble the branch upon which it is placed, that it is only recognisable when seen from above, in which position it is betrayed by its rounded interior--indeed, so completely is it hidden from observation, that a servant sent by us into a tree to discover the nest, was about to descend without it, even though it lay but two feet distant from him; and had we not recommended him to strip the branch by removing one twig after another, he probably would have sought for it in vain. This plan, however, succeeded, and the prize was secured. The skill with which these little creatures conceal their young has prevented any one from having seen the nest in progress of erection, and will account for the old-fashioned legend that the Siskin builds with invisible stones--for so very great is the difficulty of distinguishing these structures from the surrounding branches, that few naturalists have succeeded in finding them. The progress of the work is extremely rapid. The two birds that we saw laboured alternately, each waiting while the other supplied fresh materials, and then flew together in search of what more was required, bringing back beakfuls of dry