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7 Cards in this Set
- Front
- Back
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small fluffy feathers, insulation |
down |
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shape, aerodynamic, waterproof |
contour |
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fills in, keeps shape, insulation |
semi-plumes |
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attached to hand bone, propel + thrust |
primary |
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attached to ulna, lift + propulsion |
secondary |
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lift + stall attached to digits |
alula |
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steering balance |
tail |
