Haunted Wasteland - AL - Inside the stone structure where you discover the phantom guide.
Desert Colossus - AL - When you first get there, head left and it's on a palm tree near a sand pit.
Desert Colossus - AL - The magic leaf platform from the previous one will take you to one.

EITHER YOUNG OR ADULT LINK

Dodonogo's Cavern - In the big stairway room, on the vines by the second floor doorway.
Dodonogo's Cavern - In the big stairway room, right above the big stairs in a small alcove.  In order to get this one you have to return to the cavern after getting the boomerang and use the moving pillar in the big room to get to the second floor, then make your way back to this room and the stairs will be raised so you can get to it.
Dodonogo's Cavern - In the room before the boss's room where you have to push some blocks around, there's a bombable door on the north end of the room.  Bomb it open and kill the statue inside to reveal this one.
Dodonogo's Cavern - Go right from the main room into the hallway with the exploding lizards.  To your left is an alcove.  Use the scarecrow's song and hookshot to it.
Hyrule Field - As you leave Kakariko Village turn right and head to a small tree.  Bomb the ground near it, drop down the hole.  Skultulla is near ceiling
Death Mountain Trail - In a cave behind a bombable wall a little ways up the trail.