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Swinhoe, R., on the common rat in Formosa and China; behaviour of lizards when caught; on the sounds produced by the male hoopoe; on Dicrurus macrocercus and the spoonbill; on the young of Ardeola; on the habits of Turnix; on the habits of Rhynchaea bengalensis; on Orioles breeding in immature plumage. Sylvia atricapilla, young of. Sylvia cinerea, aerial love-dance of the male.
Reversion, perhaps the cause of some bad dispositions. Rhagium, difference of colour in the sexes of a species of. Rhamphastos carinatus. Rhea Darwinii. Rhinoceros, nakedness of; horns of; horns of, used defensively; attacking white or grey horses. Rhynchaea, sexes and young of. Rhynchaea australis. Rhynchaea bengalensis. Rhynchaea capensis. Rhythm, perception of, by animals.
Trachea, convoluted and imbedded in the sternum, in some birds; structure of the, in Rhynchaea. Trades, affecting the form of the skull. Tragelaphus, sexual differences of colour in. Tragelaphus scriptus, dorsal crest of; markings of. Tragopan, swelling of the wattles of the male, during courtship; display of plumage by the male; marking of the sexes of the.
The male apparently has acquired his bright colours through sexual selection in the same manner as, for instance, the peacock or pheasant in our first class of cases; and the female in the same manner as the female Rhynchaea or Turnix in our second class of cases.
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