In the month of June the Canaries--the male green, and the female piebald--were caged for the purpose of breeding. The female laid five eggs, and while she was sitting a Greenfinch egg was introduced into the nest. All of these were hatched, and the day after incubation was completed five Grey Linnets, also newly hatched, were put into the cage, in their own nest. Next day a newly-hatched nest of four Chaffinches was also introduced; and afterwards five different nests, consisting of six Titlarks, six Whitethroats, three Skylarks, three Winchars, and three Blackcaps. While rearing the last of these nests, the female Canary again laid and hatched four eggs, thus making thirty-eight young birds brought up by the pair of Canaries. It will be noticed that most of these birds are soft-billed, whose natural food is small insects; but they took quite kindly to the seeds upon which they were fed by their step-parents. The pair of Canaries fed at one time twenty-one young birds, and never had less than sixteen making demands upon their care; and while the female was hatching her second nest she continued to feed the birds that occupied the other nest. Of the origin of the _neighing sound_ which accompanies the single Snipe's play-flight during pairing-time, opinions are various. Bechstein thought it was produced by means of the beak; Naumann and others, again, that it originated in powerful strokes of the wing. Pratt, in Hanover, observing that the bird makes heard its well-known song or cry, which he expresses with the words, "gick jack, gick jack!" at the same time with the _neighing sound_, it seemed to be settled that the latter is not produced through the throat. In the meantime, M. Meves, of Stockholm, remarked with surprise, that the humming sound could never be observed whilst the bird was flying upwards, at which time the tail is closed; but only when it was casting itself downwards in a slanting direction, with the tail strongly spread out. M. Meves has written for the Zoological Society a paper upon the origin of this sound, which all the field-naturalists and sportsmen of England and other countries had, for the previous century, been trying to make out, but had failed to discover. Of this paper the following is an abstract:--