Few animals, as may easily be imagined, manifest Conjugal Love. Most species have no particular mates, but merely meet by chance, and seemingly never trouble themselves about each other again. No real conjugal love, therefore, can exist, and it is rather curious that in such animals a durable friendship is frequently formed between two individuals of the same sex. But when we come to polygamous animals, such as the stag among mammals and the domestic poultry among birds, we meet with a decided advance towards conjugal love, although as in the case of polygamous man, that love must necessarily be of an inferior character. There is seen, at all events, a sense of appropriation on either side. Take the example of the barn-yard fowl, as has already been mentioned in that part of the chapter which deals with jealousy, where it is shown that the proprietor of the harem resents any attempt on the part of another male to infringe on his privileges. This brings us to the consideration of birds, where the many are mated for the nesting-season, but subsequently do not seem to care more for each other than they do for their broods of children. If one of the pair be killed at the nesting-time the survivor, after a brief lamentation, consoles itself in a few hours or days with another partner, for there really appears to be a supply of spare partners of both sexes always at hand. And now we come to those creatures which are mated for life, and often we find among them a conjugal love as strong and as sincere as among monogamous mankind. Prominent among them are the eagle, the raven and the dove. And while we praise the turtle-dove for its conjugal fidelity, and credit it with the possession of all that is sweet, and good, and gentle, how remarkable is it that we forget to accredit with the same virtue the eagle and the raven, that are the types of all that is violent, and dark, and cunning. There are many examples in existence of the conjugal love among such birds, but they are so well known that reference to them is unnecessary. The case of the mandarin duck, already narrated, affords a strong instance of conjugal love wherein the lady was faithful and the husband avenged himself on the destruction of his domestic peace. [Illustration: MATED FOR LIFE. Conjugal Fidelity Shown by a Pair of Doves.]