. The British bird book . W^^ms^^^ and a day or two later they setout for their winter home inNorthern Africa, the last few stragglersleaving by about the end of October. The insects which this bird devours arenot gulped down, one byone, as fast as they are cap-tured. They are allowedto accumulate in the mouthuntil they form quite alarge ball, so tightly pressed together as to form analmost solid mass. Many thousands must be captured inthe course of a single day, and as a large proportion ofthem consist of the extremely mischievous aphides, whichare so destructive to many cultivated crops, the
. The British bird book . W^^ms^^^ and a day or two later they setout for their winter home inNorthern Africa, the last few stragglersleaving by about the end of October. The insects which this bird devours arenot gulped down, one byone, as fast as they are cap-tured. They are allowedto accumulate in the mouthuntil they form quite alarge ball, so tightly pressed together as to form analmost solid mass. Many thousands must be captured inthe course of a single day, and as a large proportion ofthem consist of the extremely mischievous aphides, whichare so destructive to many cultivated crops, the value ofthe bird to farmers and gardeners can scarcely beexaggerated. The nest of the swallow is made of tiny balls of clay, mixed with grass and bits of straw, lined with dry.
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Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, bookyear1921
