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Number of Great Blue Heron Nests in Portland/Vancouver Area, 1987

An image of a chart describing the number of Great Blue Heron Nests in Portland/Vancouver Area, From Initial Assessment for the Columbia Slough Master Plan, 1987.

Promoting the study of Columbia River Basin history

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Center for Columbia River History > Number of Great Blue Heron Nests in Portland/Vancouver Area, 1987

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