. Birds of a Maryland farm : a local study of economic ornithology . 1 TO Z WEEKS OLD. ADULT Fig. 17.—Diagram showing proportions of food of American crow ((owns amcrican us), young and adult. birds do great service by feeding to their young not only cutwormsand grasshoppers, but also large numbers of weevils and May-beetles. GENERAL REMARKS. Consumption of caterpillars and grasshoppers is the largest benefitderived from the presence of nestlings on the farm. The parent birds <l Most of the stomachs of young ami adult crows used in the investigation onwhich the results shown in the diagram
. Birds of a Maryland farm : a local study of economic ornithology . 1 TO Z WEEKS OLD. ADULT Fig. 17.—Diagram showing proportions of food of American crow ((owns amcrican us), young and adult. birds do great service by feeding to their young not only cutwormsand grasshoppers, but also large numbers of weevils and May-beetles. GENERAL REMARKS. Consumption of caterpillars and grasshoppers is the largest benefitderived from the presence of nestlings on the farm. The parent birds <l Most of the stomachs of young ami adult crows used in the investigation onwhich the results shown in the diagram are based were obtained at Sandy Spring,Md.; and most of those of young and adult crow blackbirds came fromOnaga, Kans. Bull. 17, Biological Survey, U. S. Dept. of Agriculture Plate IX.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1902
