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The Origin of Flapping in Birds
Transcript of The Origin of Flapping in Birds
Prey choice is independent
Hunting technique indirectly effects
Falocnini: prey is immobilized upon impact
Accipitrids/Strigiformes: prey is more likely to struggle
Struggling prey is held down by "stability flapping" Max grip strength Prey held down by body weight The Origin of Flapping in Birds http://xkcd.com/1104/ Raptor (birds of prey) Families
Accipitridae: hawks, eagles, buzzards
Falconidae: falcons, caracaras
Pandionidae: osprey Basal birds (Paraves) and Deinonychosauria used their feathered forelimbs to help hold prey down during feeding (stability flapping)
This lead to flapping for flight How did flight evolve? Three leading hypotheses
Pouncing Proavis model
Wing-assisted Incline Running
Arboreal model What does talon morphology tell us about these birds? Gallimimus Allosaurus Deinonychus "Flapping First" Hypothesis Archaeopteryx Goshawk Golden Eagle Albatross Image courtesy Steveoc 86 Requirements for Flight Airworthy wing
Strong flight stroke
High metabolic level
Coordination Stability Flapping Videos