青沼 「時のオカリナ」に登場したゾーラ族の進化した形がリト族で、コキリ族が森から離れてコログ族になった、という設定です。見た目はまるで違います が、血は継承されています。
AONUMA: We created the Rito as the evolved form of the Zora that appeared in "Ocarina of Time" and the Koroks as what the Kokiri became once they left the forest. They appear different, but they have inherited their blood.
-------------------------------------------------------------------------------
Laruto: "O great hero, chosen by the Master Sword! My name is Laruto. I am a Zora sage. For an age, I offered my prayers here in the Earth Temple, praying that the power to repel evil would ever remain within the Master Sword. And yet... unfortunately, due to Ganondorf's evil designs, the Master Sword you hold has lost this power. After his defeat at the hands of the Hero of Time, Ganondorf was sealed away... but not for all time. He was revived, and he returned to Hyrule in a red wrath. He attacked this temple and stole my soul, knowing that he had to remove the power contained in that enchanted blade. In order to return the power to repel evil to your sword, you must find another to take my stead in this temple and ask the gods for their assistance. You must find the one who carries on my bloodline... The one who holds this sacred instrument... Nothing can stop the flow of time or the passing of generations... but the fate carried within my bloodline endures the ravages of all the years. It survives. The song you just conducted is one which will open the eyes of the new sage and awaken within that sage the melody that will carry our prayers to the gods. The door that blocks your way will only open when the sage plays that song. May the winds of fortune blow with you."
:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Medli: "Just now, a sage spoke to me. She spoke so gently... There is something... something I must do. Link... Thanks to you, I've been awakened to the knowledge that I'm a sage of the Earth Temple. There's actually something that I can do to help this world. It's incredible... I bet my teacher knew all about this... Link, please... You must take me to the Earth Temple. We must hurry and wake the power to repel evil that sleeps within the Master Sword."
(SOURCE)
-------------------------------------------------------------------------------
...gosh I'm a nerd. Also, fun fact, the Rito tribe was inspired by Akira Himekawa's original Watarara race. As for evolution, it's not so hard to see how those big fins on their arms eventually were able to become wings.
