"Perisoreus Canadensis var. Capitalis AD"

Lithograph from a drawing by Robert Ridgway, T. Sinclair & Sons Lithographers. "Geographical & Geological Explorations and Surveys West of the 100th Meridian,"
Vol V. Zoology. Pl. XIII.
Castle Collection, SI.1995.024, H. ll 1/2" x W. 8 1/2"

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