Tropical Nature, and Other EssaysMacmillan and Company, 1878 - 356 pages |
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Page 199
... believe very little if any effect is directly due . It is undoubtedly proved that in birds the females do some- times exert a choice ; but the evidence of this fact collected by Mr. Darwin ( Descent of Man , chap . xiv . ) does not ...
... believe very little if any effect is directly due . It is undoubtedly proved that in birds the females do some- times exert a choice ; but the evidence of this fact collected by Mr. Darwin ( Descent of Man , chap . xiv . ) does not ...
Page 207
... believe , what is certainly the case , that these are as a rule the most brightly coloured and adorned with the finest developments of plumage , we have a real and not a hypothetical cause at work . For these most healthy , vigorous ...
... believe , what is certainly the case , that these are as a rule the most brightly coloured and adorned with the finest developments of plumage , we have a real and not a hypothetical cause at work . For these most healthy , vigorous ...
Page 208
... believe that the females prefer cer- tain males on account of the beauty of their plumage . " Again , Mr. Darwin himself says : " As a general rule colour appears to have little influence on the pairing of pigeons . " The oft - quoted ...
... believe that the females prefer cer- tain males on account of the beauty of their plumage . " Again , Mr. Darwin himself says : " As a general rule colour appears to have little influence on the pairing of pigeons . " The oft - quoted ...
Page 209
... believe , be satisfactorily explained on the general principles here laid down , without calling to our aid a purely hypothetical choice exerted by the female bird . At pairing - time , the male is in a state of excitement , and full of ...
... believe , be satisfactorily explained on the general principles here laid down , without calling to our aid a purely hypothetical choice exerted by the female bird . At pairing - time , the male is in a state of excitement , and full of ...
Page 211
... believe that this is the case , and if so , conscious sexual selection becomes as unnecessary as it would certainly be ineffective . Greater Brilliancy of some Female Birds . - There is one other very curious case of sexual colouring ...
... believe that this is the case , and if so , conscious sexual selection becomes as unnecessary as it would certainly be ineffective . Greater Brilliancy of some Female Birds . - There is one other very curious case of sexual colouring ...
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Common terms and phrases
abundant adapted adorned Africa allied Amazon animals ants Asia attract bamboo Batavia beautiful become birds blue brilliant butterflies carnivora causes changes character characteristic climate colour Colours of Animals comparatively conspicuous continent curious Danaidæ Darwin distinct Eocene equator equatorial zone existence extensive fact families fauna favourable feet female ferns fertilization flowers foliage forests fruits genera genus greater green groups habits heat humming-birds hyænas immense inhabit insects Juan Fernandez land larger larvæ leaves lemurs less light Madagascar Malay Archipelago male mammalia marsupials Miocene monkeys natural selection naturalists North northern observed occur ocean ornaments Palearctic parrots peculiar perhaps phenomena plants plumage probably produced proportion protection rays region remarkable resemble sexual selection showy slender sometimes South America species spots structure sun-birds surface tail temperate zones temperature theory tints tion trees tropical trunks Ungulata variation varied variety vegetation whole wings yellow