Things You'll Need:
- Willow tree branch
- Small carving knife
- Sandpaper
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Step 1
Cut the willow tree branch into an 8- to 10-inch section. You do not want it too short or too long as this will make pitch more susceptible to human ears.
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Step 2
Cut the width of the branch no wider than your thumb. Anything fatter and your whistle will not have a good, high pitch and it could make the whistle uncomfortable in your mouth.
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Step 3
To form your mouthpiece, slice one end of the branch at an angle.
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Step 4
Cut off that pointy and sharp part; you won't want this in your mouth.
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Step 5
Place your knife perpendicular to the mouth part to pierce a hole.
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Step 6
Using the knife, cut the other side of the hole at a small angle.
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Step 7
Keep this hole small. You can make it bigger if you need to, but you cannot add to it if you take too much away.
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Step 8
Cut the branch about 6 inches from the end of the mouthpiece.
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Step 9
Cut a circle around the inside perimeter of the branch. The goal is to hollow out the inside of the branch.
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Step 10
Using the knife blade, insert it into the center and pull out the inside of the branch. This will seem like you are pulling out a cork.
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Step 11
Carve a trench in the top of your whistle. Start small. If you want a deeper sounding whistle, make the trench deep. Higher pitched whistles will have a shallow trench.
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Step 12
Mark a small notch below the mouthpiece but before the trench.
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Step 13
Wet the newly made dog whistle to remove any rough pieces. Feel free to sand any rough edges.
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Step 14
Blow. Your whistle is ready to be used. Make any modifications as needed.











