Scarecrow's Song
How to create Scarecrow's Song in Ocarina of Time at Lake Hylia, and the spots where summoning Pierre the scarecrow reaches a Heart Piece or shortcut.
Scarecrow’s Song is a tune you compose yourself. As Child Link, visit Bonooru the scarecrow at Lake Hylia and play any 8 notes — he memorizes them. As Adult Link, play those same 8 notes near a floating Pierre target and Pierre appears as a Hookshot/Longshot point, letting you reach ledges nothing else can.
Write your notes down. You must replay the exact 8 notes as an adult. If you forget them, you can return to Bonooru as a child and re-teach the song.
This page lists the spots where summoning Pierre earns a reward. Locations are a starting point to verify as you play; screenshots are being added over time.
Teach the song
Where Pierre gets you a reward
Pierre can also be summoned at many other spots (inside dungeons and around Hyrule) as a general shortcut — anywhere you see a small scarecrow target hovering in mid-air.