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Raamatud Books 1 - 2 of 2 on ... bringing about the extinction of many of the larger species of these wingless....
" ... bringing about the extinction of many of the larger species of these wingless birds. The wide distribution of the Struthiones may, as we have already suggested (VoL I., p. 287.), be best explained, by supposing them to represent a very ancient type... "
The Geographical Distribution of Animals: With a Study of the Relations of ... - Page 368
by Alfred Russel Wallace - 1876
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The Geographical Distribution of Animals: With a Study of the ..., 2. köide

Alfred Russel Wallace - 1876
...peculiar forms. It is a remarkable fact that the two most nearly allied genera, Struthio and Shea, should be found in Africa and South Temperate America...Eocene only, supports this view ; for at this time caxnivora were few aud of generalized type, and had probably not acquired sufficient speed and activity...
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Ostriches and Ostrich Farming

Julius de Mosenthal, James Edmund Harting - 1877 - 246 lehte
...supposing them to represent a very ancient type of bird, developed at a time when the more specialised carnivorous mammalia had not come into existence,...view ; for at this time carnivora were few and of generalised type, and had probably not acquired sufficient speed and activity to enable them to exterminate...
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