Unformatted text preview: Display of colored objects Revealed plumage colors – deliberate abrasion Adventitious color alteration can result from: 1. Dirt and staining – againt the ground 2. UV damage 3. Abrasion – male male competion. .leads to aggressive behavior 4. Bacterial degradation – low immune system...
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- Spring '09
- deliberate abrasion Adventitious, Minor nutritional disruption