Moult of primaries and rectrices in the Greater Frigatebird, Fregata minor, on Genovesa, Galápagos
Bijdragen tot de dierkunde , Volume 48 - Issue 1 p. 81- 88
Greater Frigatebirds with eggs and nestlings have a complete set of primaries and rarely show active moult in rectrices. In the wing serial descendant moult can be recognized; moult may be interrupted at any primary. The tail moult shows no detectable pattern. Non-breeding adults and subadults were nearly all found moulting primaries and/or rectrices. The length of the different feather generations in the primaries is shorter in adults than in subadults. At most two primaries in one wing were found growing at the same time, whereas as many as four rectrices did. Some moult inner rectrices first, but others moult asymmetrically.
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de Korte, J, & de Vries, Tj. (1978). Moult of primaries and rectrices in the Greater Frigatebird, Fregata minor, on Genovesa, Galápagos. Bijdragen tot de dierkunde, 48(1), 81–88.