The Hebra region in The Legend Of Zelda: Breath of the Wild is vast. You can easily get lost in its snow-white mountains just exploring the biome. There are all sorts of wildlife and different enemies throughout the region.
You will also eventually stumble upon Rito Village while exploring this part of the map. Like in most of the villages in the game, there are NPCs you can talk to, and they'll give you a side quest to complete, and that's exactly how you'll receive the Bird in the Mountains Shrine Quest.
Updated April 11, 2023: The Bird in the Mountains Shrine Quest is a task that will have you exploring the snowy peaks of the Hebra region. To help you find the bird mentioned in the quest, we've updated this guide for clarity.
How To Start The Bird In The Mountains Shrine Quest
In Rito Village, there's a Rito child named Molli — speaking to her will activate the Bird in the Mountains Shrine Quest. You can find her at the edge of a platform near the top of the village.
Before talking to her, she will be looking out in the direction of the Hebra Mountains, hinting at where you'll have to go next to complete this quest.
She wants to tell Link about something that her grandfather found while exploring the area. She mentions him climbing a big mountain and stopping at a big tree, then looking northwest and seeing a huge snow-white bird with something in its belly.
Molli will then point you in the direction of said tree — it stands tall atop of Talonto Peak.
How To Find The Mozo Shenno Shrine
Once you've spoken to Molli, head to Talonto Peak, towards the tree.
Don't forget to bring cold resistance armor. Link will take damage in the cold climate otherwise.
You can also make yourself a cold resistance elixir or meal.
Just like Molli mentions, look northwest.
You will notice a location that looks strangely like a huge white bird, just as Molli said. This is called Biron Snowshelf. Head there. You can glide from the top of Talonto Peak to get there much faster.
The shrine is in a cave on the side of the mountain. If you can't reach it, just climb or use Revali's Gale to facilitate the climb.
Once you've reach the shrine, the Shrine Quest will automatically complete, and you can enter the shrine.
The Mozo Shenno Shrine leads you to a Major Test of Strength, so come prepared, as you will have to defeat a powerful Guardian to earn the Spirit Orb.