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Key terms: birds wings flight lift drag feathers gliding coverts evolved hovering bird flight digits soaring archaeopteryx flapping predators hypothesis modern birds ground up lift force claws adaptations wing loading take off ancestors dinosaurs locomotion ornithology early birds high aspect ratio wings larger birds energetically powered flight underwing coverts skeleton high speed wings hardcover slots university press elliptical wings large birds primaries embryological forelimbs aerodynamic birds use downforce hummingbird trees down airfoil Search external links cited by footnotes on Wikipedia page Bird flight: |
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