Tropical Nature and Other Essays (Classic Reprint)

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Fb&c Limited, 18. okt 2017 - 376 pages
Excerpt from Tropical Nature and Other Essays

The remaining chapters have all a more or less direct connection with the leading subject. The family of humming-birds is taken as an illustration of the luxuriant development of allied forms in the tropics, and as showing the special mode in which natural selection has acted to bring about considerable changes in a limited period. The discussion on the nature and origin of the colours of animals and plants, is intended to show how far and in what way these are dependent on the climate and physical conditions of the tropics. The chapter entitled By-paths in the Domain of Biology contains an account of certain curious relations of colour to locality, which are almost exclusively manifested within the tropical zones; while the essay on Distribution of Animals and Geographical Changes, elucidates the relations of the several continents in past time, and the probable origin of many of the groups new characteristic of tropical or of temperate regions.

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