Horses can be blindfolded at birth and when removed do basic navigation with no time for any training. Other non-visually precocious animals like cats, if they miss a critical development period without getting natural vision data, will never develop a functioning visual system.

Baby chicks can do bipedal balance pretty much as soon as they dry off.

Wood ducks can visually imprint very soon after hatching and drying off, a couple hours after birth with very limited visual data up until then and no interspersed sleep cycles.

We as humans have natural reactions to snake like shapes etc. even before encountering the danger of them or learning about it from social cues. Babies

I've pondered this often, especially kangaroos where the half-developed fetus can climb up into the pouch.

Clearly we're just hardwired for certain tasks, in such a way that the function is primarily dictated by topology.

This weight agnostic neural network page[1] explores this, but obviously isn't the true answer.

[1]: https://weightagnostic.github.io/

It's not clear whether humans have natural reactions to snakes. https://link.springer.com/article/10.11133/j.tpr.2013.63.4.0...