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Teokset Teokset 1 - 10 / 16 haulle The Sparrow Hawk is almost exclusively insectivorous except when insect food is difficult....
" The Sparrow Hawk 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.... "
The Diseases and enemies of poultry - Sivu 199
tekijä(t) Pennsylvania. Dept. of Agriculture - 1897
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Report of the Commissioner of agriculture 1888

U.S. department of agriculture Commissioner's OFfice - 1889
...localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...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...

Report of the Commissioner of Agriculture

United States. Department of Agriculture - 1889
...localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...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...

Yearbook of Agriculture

1889
...localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...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...

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

United States. Department of Agriculture - 1889
...where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized Hocks, and gorge themselves continuously. Rarely do they...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...

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

Albert Kenrick Fisher - 1893 - 210 sivua
...abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Barely do they touch any other form of food until, either...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...

Bulletin, Numero 3

1893
...abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Barely do they touch any other form of food until, either...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...

Bulletin, Numerot 5–13

1895
...localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...until, either by the advancing season or other natural muses, the grasshopper crop is so lessened that their hunger can not be appeased without undue exertion....

Bulletin, Numerot 9–12

1898
...abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Earely do they touch any other form of food until, either...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...

Legislation for the protection of birds other than game birds

Theodore Sherman Palmer - 1900 - 94 sivua
...localities where grasshoppers and crickets are abundant these hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...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...

Gray Lady and the Birds: Stories of the Bird Year for Home and School

Mabel Osgood Wright - 1907 - 437 sivua
...localities where grasshoppers and crickets are abundant, these Hawks congregate, often in moderate-sized flocks, and gorge themselves continuously. Rarely...they touch any other form of food until, either by advancing season or other natural causes, the grasshopper crop is so lessened that their hunger cannot...




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