The second impulse relates to the pursuit and attraction of mates. It is first found among the lower types of the animal kingdom. The sweet odors and showy colors found in flowers are nothing else but the means of attracting the insects that carry the pollen for fertilization. The bright colors of some animals, especially among birds, and other animal adornments also serve to attract the mates. The woman’s love for finery also emanates from no other source than from the impulse of pursuit and attraction of mates. The third impulse stands in relation to permanent mating and the protection of the young. It is the impulse relating to the germs of family life, and is present among those animals that have gained a higher place in the ascending scale of complexity and whose young are more difficultly provided for.[AA] Through the whole range of animal life, where the period of infancy is comparatively short (e. g. horse, dog, cat, etc.), the male part is ended with impregnation or copulation. The nursing of the young is left to the female,[AB] and she will sacrifice her own life in the protection of her breed. In animals whose young are not easily provided for (e. g. fox, wildcat, eagle, sparrow, pigeon, stork, etc.), not only the mother will sacrifice her own existence in the protection of her offspring, but also the father will do his utmost in the interest of his young ones. In these animals the males remain attached to the females they have secured at the first period of oestrum even after the time of propagation has passed, provide mutually for their offspring until the latter can provide for themselves, and at each succeeding period of rut, yield again to love and never seek a new mate until the old one dies. Ernest Thompson Seton found that hawks practise monogamy and that wolves consort for life, and, in case of death, the survivor remains alone. The Canadian wild goose, when it has lost its mate, will never seek another. Thus the instinct of permanent mating or of monogamic marriage, is a phenomenon already found among many animals.