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Updated: May 3, 2025
Sexual differences Law of battle Special weapons Vocal organs Instrumental music Love-antics and dances Decorations, permanent and seasonal Double and single annual moults Display of ornaments by the males. Secondary sexual characters are more diversified and conspicuous in birds, though not perhaps entailing more important changes of structure, than in any other class of animals.
But the most curious case is afforded by three allied genera of Australian birds, the famous Bower-birds, no doubt the co-descendants of some ancient species which first acquired the strange instinct of constructing bowers for performing their love-antics. Both sexes assist in the erection of the bowers, but the male is the principal workman.
In these Partridge-dances, as they are called by the hunters, the birds assume the strangest attitudes, and run round, some to the left and some to the right. Certain birds perform their love-antics on the wing, as we have seen with the black African weaver, instead of on the ground.
Ostrich, African, sexes and incubation of the. Ostriches, stripes of young. Otaria jubata, mane of the male. Otaria nigrescens, difference in the coloration of the sexes of. Otis bengalensis, love-antics of the male. Otis tarda, throat-pouch of the male; polygamous. Ouzel, ring-, colours and nidification of the. Ouzel, water-, singing in the autumn; colours and nidification of the.
Love-antics and dances of birds. Lowne, B.T., on Musca vomitoria. Loxia, characters of young of.
In their movements the Belugas are remarkably active, and are very playful, leaping into the air in their love-antics, rolling over and over, chasing each other, and displaying in many ways their wonderful agility. They often follow vessels in schools of forty and fifty, and old whalers claim that they utter a whistling sound that can be heard distinctly above the water.
Birds, imitations of the songs of other birds by; dreaming; killed by telegraph wires; language of; sense of beauty in; pleasure of, in incubation; male, incubation by; and reptiles, alliance of; sexual differences in the beak of some; migratory, arrival of the male before the female; apparent relation between polygamy and marked sexual differences in; monogamous, becoming polygamous under domestication; eagerness of male in pursuit of the female; wild, numerical proportion of the sexes in; secondary sexual characters of; difference of size in the sexes of; fights of male, witnessed by females; display of male, to captivate the females; close attention of, to the songs of others; acquiring the song of their foster-parents; brilliant, rarely good songsters; love-antics and dances of; coloration of; moulting of; unpaired; male, singing out of season; mutual affection of; in confinement, distinguish persons; hybrid, production of; Albino; European, number of species of; variability of; geographical distribution of colouring; gradation of secondary sexual characters in; obscurely coloured, building concealed nests; young female, acquiring male characters; breeding in immature plumage; moulting of; aquatic, frequency of white plumage in; vocal courtship of; naked skin of the head and neck in.
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