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Description:"This study shows the changes in populations of costal [sic] and island nesting colonies of Great blue herons (Ardea herodius) and, incidentally, Great egrets (Casmerodius albus) since the last complete census in 1976 and 1977..."--leaf 1.
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Content Notes:by William C. Scharf.
Supported in part by the Office of Coastal Zone Management, National Oceanic and Atmospheric Administration.
Also available online in PDF.
Includes bibliographical references (leaf 9).
The entire four Michigan Great Lake coasts, the three connecting rivers, and Lake St. Clair, up to 1 km. inland for each.
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Rights Information:Public Domain
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