Quantifying variability of avian colours: are signalling traits more variable? by Kaspar Delhey, Anne Peters

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Seasonal changes in colour: a comparison of structural, melanin- and carotenoid-based plumage colours. by Kaspar Delhey, Claudia Burger, Wolfgang Fiedler, Anne Peters

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Ornaments are equally informative in male and female birds by Sergio Nolazco, Kaspar Delhey, Shinichi Nakagawa, Anne Peters

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What drives our aesthetic attraction to birds? by Andrea Santangeli, Anna Haukka, William Morris, Sarella Arkkila, Kaspar Delhey, Bart Kempenaers, Mihai Valcu, James Dale, Aleksi Lehikoinen, Stefano Mammola

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Biology of the Rufous Hornero, from mechanisms to behavioral ecology: a potential Neotropical model species? by Lucia Mentesana, Ana Amador, Paulo Amorim, Kaspar Delhey, Pedro Diniz, Rosendo Fraga, Gabriel B Mindlin, Juan C Reboreda, Alejandro Schaaf, Bettina Tassino, Nicolas M. Adreani

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