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Unique mid-tract loss of a primary remex in male broadbills of the Southeast Asian genus Calyptomena: timing and possible implications

David R. Wells, Auteur

Dans Ibis (153(2) APR 2011)

Female Calyptomena broadbills have 10 large primaries, whereas adult males have nine. At or before the main post-juvenile moult, males abort what appears to be juvenile P5. This creation of row space is accompanied by a shortening of the wing ti[...]

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