How to see like a surgeon: Cracking the code of visual expertise to train AI

We commonly say an art curator casts "an expert eye" over a painting, or an auditor over a set of accounts.

But what is it that, for example, allows an experienced birdwatcher to identify an uncommon species rapidly, at a distance and against a chaotic background in the wild?

And what separates the gaze of a qualified brain surgeon from that of a first-year medical student?

How is that kind of visual expertise acquired? ...