ALULA

Alula

The alula, or bastard wing, is a small projection on the anterior edge of the wing of modern birds. The word is Latin and means "winglet"; it is the diminutive of ala, meaning "wing". The alula is the freely moving first digit, a bird's "thumb," and typically bears three to five small flight feathers, with the exact number depending on the species. There also are minor covert feathers overlying the flight feathers. Like the larger flight feathers found on the wing's trailing edge, these alula feathers are asymmetrical, with the shaft running closer to anterior edge.

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alula

Noun

  1. Bastard wing. A small projection on the anterior edge of the wing on some birds.


The above text is a snippet from Wiktionary: alula
and as such is available under the Creative Commons Attribution/Share-Alike License.

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