Avian Forelimb Muscles and Nonsteady Flight: Can Birds Fly Without Using the Muscles in their Wings?
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منابع مشابه
Flapping before Flight: High Resolution, Three-Dimensional Skeletal Kinematics of Wings and Legs during Avian Development
Some of the greatest transformations in vertebrate history involve developmental and evolutionary origins of avian flight. Flight is the most power-demanding mode of locomotion, and volant adult birds have many anatomical features that presumably help meet these demands. However, juvenile birds, like the first winged dinosaurs, lack many hallmarks of advanced flight capacity. Instead of large w...
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Birds are prolific colonists of islands, where they readily evolve distinct forms. Identifying predictable, directional patterns of evolutionary change in island birds, however, has proved challenging. The "island rule" predicts that island species evolve toward intermediate sizes, but its general applicability to birds is questionable. However, convergent evolution has clearly occurred in the ...
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Studies of medium- and large-bodied avian species have suggested that variation in flight muscle composition is related to differences in flight behavior. For example, slow-twitch or tonic fibers are generally found only in the flight muscles of non-volant or soaring/gliding birds. However, we know comparatively little about fiber composition of the muscles of the smallest birds. Here we descri...
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The science of animal flight requires the quantification of wing movement over a range of behaviors. Despite numerous studies of avian locomotion, we are only beginning to grasp the intricacies of flapping flight. Birds create aerodynamic forces by manipulating the fluid environment of air by beating their wings. The question remains, how do they perform such a wide range of locomotor behaviors...
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