"We behold the face of nature bright with gladness, we often see superabundance of food; we do not see, or we forget, that the birds which are idly singing round us mostly live on insects or seeds, and are thus constantly destroying life; or we forget how largely these songsters, or their eggs, or their nestlings, are destroyed by birds and beasts of prey; we do not always bear in mind, that though food may be now superabundant, it is not so at all seasons of each recurring year."
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Original Language: English
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1st ed. (1859) p. 62
https://en.wikiquote.org/wiki/On_the_Origin_of_Species
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On the Origin of Species
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