In Bird Land
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In our eReader you can find the full English version of the book. Read In Bird Land 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 In Bird Land
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If the first birds lived in tropical climates, as was probably the case, some of them, as the food supply became exhausted, would be crowded northward, or would go of their own accord, and wherever they went they would find well-filled natural larders. Having once discovered that spring replenished the north with food, they would soon learn the desirability of making periodical journeys to that part of the globe.
With this constant quest for food must also be coupled the instinctive desire of m...ost birds for seclusion during the season of reproduction, — an instinct that would naturally drive them northward into the less thickly tenanted districts. But it may be objected that many species make long aerial voyages, passing over vast tracts of country to reach their chosen summer habitats in various parts of the north ; and it is well known that the same individ- uals will return again and again, on the recurrence of spring, to the same locality. How are these facts to be accounted for?
What to read after In Bird Land?
You can find similar books in the "Read Also" column, or choose other free books by Keyser, Leander Sylvester, 1856- to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
If the first birds lived in tropical climates, as was probably the case, some of them, as the food supply became exhausted, would be crowded northward, or would go of their own accord, and wherever they went they would find well-filled natural larders. Having once discovered that spring replenished the north with food, they would soon learn the desirability of making periodical journeys to that part of the globe.
With this constant quest for food must also be coupled the instinctive desire of m...ost birds for seclusion during the season of reproduction, — an instinct that would naturally drive them northward into the less thickly tenanted districts. But it may be objected that many species make long aerial voyages, passing over vast tracts of country to reach their chosen summer habitats in various parts of the north ; and it is well known that the same individ- uals will return again and again, on the recurrence of spring, to the same locality. How are these facts to be accounted for?
What to read after In Bird Land?
You can find similar books in the "Read Also" column, or choose other free books by Keyser, Leander Sylvester, 1856- to read onlineMoreLess
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