How are unwitnessed behaviours (such as an adult bird building a nest the chick never saw the construction of) passed onto the next generation?

Question

How are unwitnessed behaviours (such as an adult bird building a nest the chick never saw the construction of) passed onto the next generation?

In: 7354

Answer 1

No helpful answers so far. Only “instinct” and “random mutations that are passed on”. That doesn’t answer the OPs question of *how*instinct works. How does a spider know to build a hexagonal web? A robot spider would have that programmed in its code—you could Control-F and look up the number “6”. How does a bundle of proteins know the concept of “6”? How does ACGT in a beaver know what a running river sounds like? I think that’s the actual question