. Bulletin - Biological Survey. Zoology, Economic. HALF GROWN. ADULT Fig. 18.—Diagram sho^ving proportions of food of crow blackbird. {Quiscahis quiscula xneus), young and adult. the protection and encouragement of birds at nesting time is of prime importance. Adults of the most numerous species on the farm are either highly f rugivorous or highly granivorous, hence the insectiv- orous habits of nestlings help considerably to establish the beneficent relation of birds to the farm economy. 7222—No. 17—02 i. Please note that these images are extracted from scanned page images that may have been
. Bulletin - Biological Survey. Zoology, Economic. HALF GROWN. ADULT Fig. 18.—Diagram sho^ving proportions of food of crow blackbird. {Quiscahis quiscula xneus), young and adult. the protection and encouragement of birds at nesting time is of prime importance. Adults of the most numerous species on the farm are either highly f rugivorous or highly granivorous, hence the insectiv- orous habits of nestlings help considerably to establish the beneficent relation of birds to the farm economy. 7222—No. 17—02 i. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Bureau of Biological Survey. Washington : Govt. print. off.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherwashingtongovtprin
