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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.
A small, freely-moving projection on the anterior edge of the wing of modern birds (and a few non-avian dinosaurs)—a bird's "thumb"—the word is Latin and means 'winglet'; it is the diminutive of ala, meaning 'wing'. Alula typically bear three to five small flight feathers, with the exact number depending on the species.
The skeleton of a bird wing. Places of attachment of various groups of flight feathers are indicated. The mute swan with outstretched wings Wing of the white-tailed eagle. Bird wings are a paired forelimb in birds. The wings give the birds the ability to fly, creating lift. Terrestrial flightless birds have reduced wings or none at all (for ...
A variant of the oozlum, possibly a mutation, is the weejy weejy bird, which has only one wing which causes it to fly in tighter, faster, smaller circles, until it disappears up its own fundament. The oozlefinch is an American relative without feathers that flies backwards ("to keep dust, trivia, and other inconsequentia out of his eyes") at ...
This only lasts until feathers are replaced during the moult; however, the flight feathers are only replaced once or twice a year, depending on the species. The process of capturing and clipping can cause considerable distress to birds. Permanent enclosures designed to prevent accidental egress (escape) of birds remove the need for pinioning.
For ground-feeding birds, a cursorial lifestyle is more economical and allows for easier access to dietary requirements. [7] Flying birds have different wing and feather structures that make flying easier, while flightless birds' wing structures are well adapted to their environment and activities, such as diving in the ocean. [21]
If, by chance, the bird is looking away from you, then Doolittle believes that the red Cardinal has messages for you, but "you may be missing [them] by being too busy or too distracted from your ...
In modern birds this is formed by feathers anchored to the first digit of the hand, but this digit appears to have been free of feathers and independent of the body of the wing in Confuciusornis. [9] According to Dieter Stefan Peters, to compensate for the lack of an alula, the third finger might have formed a separate winglet below the main ...