Inheritance in canaries by Davenport

Goldfinch and Goldfinch X Crested Yellow Canary cross offspring

The top bird is the result of a Goldfinch X Crested Yellow Canary cross. The bottom bird is the Goldfinch father.

Inheritance in canaries
by Charles Benedict Davenport

Published 1908
Papers of the Station for Experimental Evolution, no. 10
Publisher Washington, D. C., Carnegie Institution of Washington
Pages 50

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https://archive.org/details/cu31924022565141