The phaeo or ino factor: Part 15 The ino or phaeo factor acts mainly on ALL eumelanins; so all the brown and black eumelanin is pushed out of the appearance of these birds. Only the brown phaeomelanin remains. These birds have red eyes. In the classic color canaries, the brown and the birds from the black series still have a maximum amount of brown phaeomelanin. Agates and isabelles were largely stripped of this phaeomelanin by the first reduction factor. With the latter, under the influence of the ino factor, we get fat-colored canaries, or usually almost.
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