Search for: [Subject and Keywords = Melanin] OR [Subject and Keywords = copper] OR [Subject and Keywords = diet] OR [Subject and Keywords = plumage] OR [Subject and Keywords = Passer domesticus] OR [Title = Production of melanin\-based plumage traits in male house sparrows\: no effect of dietary copper] OR [Creator = Stewart, Ian R.K.] OR [Creator = Westneat, David F.]