--and we know that he is going rapidly--other coarser fringilline birds, without the melody, brightness, and charm of the goldfinch--sparrow and bunting--come in, and in some rough fashion supply its place; but when the kingfisher disappears an important place is left absolutely vacant, for in this case there is no coarser bird of homely plumage with the fishing instinct to seize upon it. Here, then, is an excellent opportunity for an experiment. In the temperate regions of the earth there are many fine kingfishers to select from; some are resident in countries colder than
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England, and are consequently very hardy; and in some cases the rivers and streams they frequent are exceedingly poor in fish. Some of them are very beautiful, and they vary in size from birds no larger than a sparrow to others as large as a pigeon.
Anglers might raise the cry that they require all the finny inhabitants of our waters for their own sport. It is scarcely necessary to go as deeply into the subject as mathematical-minded Mudie did to show that Nature's lavishness in the production of life would make such a contention unreasonable. He demonstrated that if all the fishes hatched were to live their full term, in twenty-four years their production power would convert into fish (two hundred to the solid foot) as much matter as there is contained in the whole solar system--sun, planets, and satellites! An "abundantly startling" result, as he says. To be well within the mark, ninety-nine out of every hundred fishes hatched must somehow perish during that stage when they are nothing but suitable morsels for the kingfisher, to be swallowed entire; and a portion of all this wasted food might very well go to sustain a few species, which would be
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beautiful ornaments of the waterside, and a perpetual delight to all lovers of rural nature, including anglers. It may be remarked in passing, that the waste of food, in the present disorganized state of nature, is not only in our streams.
The introduction of one or more of these lovely foreign kingfishers would not certainly have the effect of hastening the decline of our native species; but indirectly it might bring about a contrary result--a subject to be touched on at the end of this paper. Practical naturalists may say that kingfishers would be far more difficult to procure than other birds, and that it would be almost impossible to convey them to England. That is a question it would be premature to discuss now; but if the attempt should ever be made, the difficulties would not perhaps be found insuperable. In all countries one hears of certain species of birds that they invariably die in captivity; but when the matter is closely looked into, one usually finds that improper treatment and not loss of liberty is the cause of death. Unquestionably it would be much more difficult to keep a kingfisher alive and healthy during a long sea-voyage than a common seed-eating bird; but the