. Bulletin - Biological Survey. Zoology, Economic. 30 NORTH AMERICAN HERONS AND THEIR FIG. 10.—Least bittern (Ixobrychus cxilis).. 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