Why is it so difficult for us to just replicate a bird instead of the kind of fixed wing aircraft we have?

Question

Why is it so difficult for us to just replicate a bird instead of the kind of fixed wing aircraft we have?

In: 164

Answer 1

We build with metal, it’s much easier to build static wings and spinning engines. Birds build with bone and muscle. For them it’s easier to build things that stretch and retract.