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Petrocossyphus cyanus (Blue Rockthrush)
Petrocossyphus cyanus (Blue Rockthrush)
Petrocossyphus cyanus (Blue Rockthrush)
John Gould and H.C. Richter, active 1841 – active ca 1881.

Petrocossyphus cyanus (Blue Rockthrush).

Hand-colored lithograph.
Inv. Nr. 1972.77.6,
Washington, National...
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