 | Biology - 1900 - 794 pages
...The grasshopper sparrow in particular and the other species of the genus Ammodramus in general feed much less on vegetable matter than most other sparrows....insect pests the grasshopper sparrow is most efficient. It is not only superior to other members of the same genus, but is even more efficient than such valuable... | |
 | Zoology, Economic - 1900 - 500 pages
...The grasshopper sparrow in particular and the other species of the genus Ammodramus in general feed much less on vegetable matter than most other sparrows....insect pests the grasshopper sparrow is most efficient. It is not only superior to other members of the same genus, but is even more efficient than such valuable... | |
 | Sylvester D. Judd - Sparrows - 1901 - 110 pages
...The grasshopper sparrow in particular and the other species of the genus Ammodramus in general feed much less on vegetable matter than most other sparrows....insect pests the grasshopper sparrow is most efficient. It is not only superior to other members of the same genus, but is even more efficient than such valuable... | |
 | John Hall Sage, Louis Bennett Bishop - Nature - 1913 - 382 pages
...The Grasshopper Sparrow in particular, and the other species of the genus Ammodramus in general, feed much less on vegetable matter than most other sparrows....insect pests the Grasshopper Sparrow is most efficient. It is not only superior to other members of the same genus, but is even more efficient than such valuable... | |
 | United States. Bureau of Biological Survey, Arthur Holmes Howell - Birds - 1924 - 404 pages
...63 per cent. Judd, after examining 170 stomachs, sums up the bird's economic relations as follows: As a destroyer of insect pests the grasshopper sparrow is most efficient, • * • and both the vegetable and animal food considered, it seems to be individually the most Useful... | |
 | Florence Merriam Bailey, Wells Woodbridge Cooke - Birds - 1928 - 1054 pages
...such grasses as are troublesome on the farm, amounts to about one-fourth of the food. Of the animal, beetles, grasshoppers, and caterpillars are the most important. As a destroyer of insect pests it is most efficient. The injurious part of its food is only 3 per cent of the whole and the neutral... | |
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The entire weed seed element, including the seeds of such grasses as are troublesome on the farm (7 per cent of the total food), amounts to about one-fourth of the food. " The Grasshopper Sparrow in particular, and the other species of the genus Ammodramus... 