Here's my offset opinion:
The Zora didn't evolve. Why would they evolve? If their water mass just got BIGGER why try and live above water?
No, I considered the Korok's evolution. The Koroks learned how to fly using the leaves provided by the Great Deku Tree Jr.
The Gorons are either IN the mountains, or mostly wiped out, but they still exist so It's not Gorons.
Hylians obviously are still around on islands.
The Gerudos...are still pirates i'm sure. I believe that they lived in the fortress and then Ganondorf turned them all into pigs.
So what major race does this leave?
What race is the only one with beaks, and still canon?
What's the race that everyone forgets, figuratively and literally?
Skull kids.
Skull kids have beaks. And if they're all lost in the forest, how can they figure out how to do things like Koroks? Through the spirit of Valoo. Note that after the flood(Dependent on which timeline you go by), Skullkids no longer have beaks.
Skull kids are pretty much helpless as the land is about to flood.
However, they all have the 'Zora symbol' but i'm stuck on thinking that that symbol isn't Zora so much as Nayru. Who happened to play a harp as an incarnated Oracle.
Also, If you'll look at Stalchildren and Ritos, they both have red eyes. Zora eyes are fishy black.