Manual of Natural History
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In our eReader you can find the full English version of the book. Read Manual of Natural History Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Manual of Natural History
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" For the rest, there is always a very good means of ascertaining if certain birds are useful or injurious to agriculturists, and this is to kill one or two occasionally at different seasons of the year, and to notice what food they have in their stomach ; if corn, the bird is mischievous, but if it is remains of insects or grubs, the bird is useful. This is the best method of judging of the merits of such birds as rooks, which are alternatively regarded as useful or mischievous. But it will no...t suffice to limit ourselves to examining what the bird eats once in the course of the year ; it will be necessary to begin again at different seasons, because a bird which eats corn at harvest-time or seed-time for instance, destroys insects all the rest of the year ; and the farmer must then calculate whether the injury done by the bird in eating his corn, is counterbalanced or not by the advantage of seeing them destroy his true enemies i. E. , insects. In a general way we may say that all birds live on insects in spring, corn in summer, and berries in winter.
What to read after Manual of Natural History?
You can find similar books in the "Read Also" column, or choose other free books by Adolphe Boucard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
" For the rest, there is always a very good means of ascertaining if certain birds are useful or injurious to agriculturists, and this is to kill one or two occasionally at different seasons of the year, and to notice what food they have in their stomach ; if corn, the bird is mischievous, but if it is remains of insects or grubs, the bird is useful. This is the best method of judging of the merits of such birds as rooks, which are alternatively regarded as useful or mischievous. But it will no...t suffice to limit ourselves to examining what the bird eats once in the course of the year ; it will be necessary to begin again at different seasons, because a bird which eats corn at harvest-time or seed-time for instance, destroys insects all the rest of the year ; and the farmer must then calculate whether the injury done by the bird in eating his corn, is counterbalanced or not by the advantage of seeing them destroy his true enemies i. E. , insects. In a general way we may say that all birds live on insects in spring, corn in summer, and berries in winter.
What to read after Manual of Natural History?
You can find similar books in the "Read Also" column, or choose other free books by Adolphe Boucard to read onlineMoreLess
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