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Գրքեր Գրքեր 11 - 16 16-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

Birds in Their Relations to Man: A Manual of Economic Ornithology for the ...

Clarence Moores Weed, Ned Dearborn - 1903 - 380 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...birds may be required to bring up the balance." In the sparse pine woods of the sandy barrens of southern Florida we have found the sparrow-hawk one of...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Birds in Their Relations to Man: A Manual of Economic Ornithology for the ...

Clarence Moores Weed, Ned Dearborn - 1903 - 380 էջ
...appeased without undue i-xi-rtioii; then other kinds of bisects and other forms of life contrihnli' to their fare, and beetles, spiders, mice. shrews,...birds may be required to bring up the balance." In the sparse pine woods of the sandy barrens of southern Florida we have found the sparrow-hawk one of...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Wisconsin Arbor and Bird Day Annual

1909
...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

Bird Lore, Volume 6

1904
...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...and other forms of life contribute to their fare; anil beetles, spiilers, mice, shrews, small snakes, lizards, or even birds may l>e required to bring...
Ամբողջությամբ դիտվող - Այս գրքի մասին

The High Plains grasshopper: a compilation of facts about its occurrence and ...

Claude Carl Wakeland - 1958 - 168 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. . . . ************ HW Henshaw [said:] "where [grasshoppers]...
Ամբողջությամբ դիտվող - Այս գրքի մասին

Bird-lore

1903
...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...shrews, small snakes, lizards, or even birds, may he required to bring up the balance. "In some places in the West and South telegraph poles pass for...
Ամբողջությամբ դիտվող - Այս գրքի մասին




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