So the way I’m interpreting this is that the finch’s song neurons are pass-by-value and the budgerigar’s are pass-by-reference.

I’m not terribly surprised, parrots can store information on materials, color, and then recite it in English. Even if they don’t have the vocal chords to do so, I’m sure certain primates, whales, and potentially certain canines could do similar things with sign languages or brain-computer interfaces.

If people can teach dogs math, and wolves can do insanely complicated lab experiments and real world problem-solving, I’m sure our brains aren’t terribly different.

Here’s an interesting one of a parrot that can differentiate materials and colors.

https://youtu.be/B8-ZmuJixIg