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Գրքեր Գրքեր 1 - 10 20-ից՝ ... is almost exclusively insectivorous except when insect food is difficult to obtain.... որոնման արդյունքներում:
" ... is almost exclusively insectivorous except when insect food is difficult to obtain. In localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely do they... "
Gray Lady and the Birds: Stories of the Bird Year for Home and School - Էջ 173
Mabel Osgood Wright - 1907 - 437 էջ
Ամբողջությամբ դիտվող - Այս գրքի մասին

Report of the Commissioner of Agriculture

United States. Department of Agriculture - 1889
...and gorge themselves continuously. Rarely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and otner forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Report of the Commissioner of Agriculture for the Year ...

United States. Department of Agriculture - 1889
...and gorge themselves continuously. Rarely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Yearbook of Agriculture

1889
...and gorge themselves continuously. Rarely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Report of the Commissioner of agriculture 1888

U.S. department of agriculture Commissioner's OFfice - 1889
...and gorge themselves continuously. Rarely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

The Hawks and Owls of the United States in Their Relation to Agriculture

Albert Kenrick Fisher - 1893 - 210 էջ
...and gorge themselves continuously. Barely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Bulletin, Issue 3

1893
...and gorge themselves continuously. Barely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Bulletin, Issues 5-13

1895
...advancing season or other natural muses, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds...and other forms of life contribute to their fare. Beetles, spiders, mice, shrews, small snakes, lizards, or even birds may be required to bring up the...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Bulletin, Issues 9-12

1898
...and gorge themselves continuously. Earely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Legislation for the protection of birds other than game birds

Theodore Sherman Palmer - 1900 - 94 էջ
...and gorge themselves continuously. Rarely do they touch any other form of food until, either by the advancing season or other natural causes, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion. Then other kinds of insects and other forms of life contribute...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Proceedings of the Ohio Academy of Science, Volume 3

Ohio Academy of Science - 1901
...causes, the grasshopper crop is so lessened that they can no longer appease their hunger except by undue exertion. Then other kinds of insects and other...spiders, mice, shrews, small snakes, lizards or even small birds are required to bring up the balance." (Fisher.) It therefore seems certain that the farmer...
Ամբողջությամբ դիտվող - Այս գրքի մասին




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