An anomaly in the number of secondary feathers in the Reed Bunting (Emberiza schoeniclus)

• Autores: Albert Bertolero Badenes, Lluís Gustamante, Jordi Figuerola Borras, Xavier Rivera
• Localización: Butlletí del Grup Català d'Anellament, ISSN 1130-2070, Vol. 9, Nº. 1, 1992, págs. 17-18
• Idioma: inglés
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• Resumen

  • A Reed Bunting with an extra secondary in the right wing was captured on 0 1.02.92 at Canal Vell (Deltebre, Tarragona). This extra secondary was heavily abraded and was unharmoniously situated between the fifth and the sixth secondaries. The most probable explanation for this feather was that it could be a "one off", produced during juvenile development with no ensheathed tip of the next feather generation at the base of the calamus.