two features of aces which help them in fly
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If by aces you mean aves then :
1. Forelimbs modified to wings
2. Air sac in lungs that reduce fill with air during flight and help in buoyancy.
3. Porifirated bones that reduce body weight.
1. Forelimbs modified to wings
2. Air sac in lungs that reduce fill with air during flight and help in buoyancy.
3. Porifirated bones that reduce body weight.
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