The Bunun call the pheasant bird “Mumu.” Its body is roughly the size of a palm, and it looks like a cute and fluffy chick. One day, a giant saw the pheasant strutting about on the ground, and he mocked the pheasant, “You are so tiny! You might get blown away by the wind! The other birds are soaring high up in the sky, only you are strutting about on the ground. You must be a weak and tiny bird that can't fly well!” The giant laughed loudly after he finished speaking. The pheasant puffed up his chest in indignance and said loudly, “Being tall and strong doesn't give you the right to make fun of others! I may be small but I am strong! If we have a competition, you might not beat me!”

After the giant listened to the pheasant, he thought for a while. Then, he pointed to a boulder ahead and said, “Let's have a competition to see who can lift that boulder.” The pheasant replied, “I accept your challenge! Be prepared to lose.” And so, the giant and the pheasant asked an elder to be their witness, and the competition began. The giant went first, but he could barely lift the boulder with two hands. He said with a sweaty forehead, “This boulder is too heavy! I can't move it.” He sat down on the ground to rest. It was the pheasant's turn to lift the boulder. The pheasant lifted the boulder with only one wing, while the other wing remained on his waist. As he lifted the boulder, the pheasant called, “Mu~ mu~ mu~”

In the end, the pheasant won the competition. The giant felt ashamed of himself and told the pheasant, “I am sorry for making fun of you. I will not make fun of others anymore.” Because the pheasant makes “Mu~ Mu~” sounds when it moves rocks around, the Bunun people named the pheasant “Mumu.”

布農族人將雉鳥稱為mumu，牠的身體只有一個手掌的大小，好像一隻可愛的小雞。有一天，一個高大的巨人看到雉鳥在地上走，就嘲笑雉鳥：「哇！你的身體怎麼這麼小啊！看起來好像會被風吹走耶！而且其他的鳥兒都在空中自由翱翔，只有你在地上慢慢走，我看你一定是一隻飛得不高也不遠的小小鳥！」巨人說完後，開心地哈哈大笑。雉鳥聽完後生氣地鼓起胸膛大聲說：「你以為自己長得高大就可以取笑別人嗎？我雖然嬌小，但是我的力氣可是很大的呢！很多事情沒有經過比賽是分不出勝負的，我也不一定會輸給你。」

巨人聽完雉鳥的話，想了一會兒，就指著前方一塊大石頭說：「那我們就來比賽搬石頭，看誰能把這塊石頭舉起來。」雉鳥說：「好啊！我要看你能神氣到什麼時候。」於是，巨人和雉鳥就開始進行比賽，還請了一位年長的老人當裁判。比賽時，巨人才剛用雙手將石頭搬離地面一下子，就滿頭大汗說：「好重啊！我搬不動了，這塊石頭實在是太重啦！」說完就累的坐在地上休息。接著換雉鳥搬石頭，雉鳥展開翅膀， 一邊插著腰一邊用力地將石頭舉高，嘴裡還發出「mu～mu～mu～」的聲音。

比賽結果，雉鳥贏了，巨人也慚愧地對雉鳥說：「真是對不起，我以後再也不敢取笑別人了。」由於，雉鳥搬石頭時會發出「mu～mu～」的聲音，布農族人就稱牠為mumu。