Silent Marten Repellent Convex Mirror

DIY Mirror for Marten Deterrence

These simple convex mirrors have proven to be very effective in scaring away martens – completely silently and without disturbing nature or wildlife.

How does it work?
When a marten approaches, it sees movement in the mirror and often mistakes it for another animal. This irritates and unsettles the marten, so it usually avoids the area.

The convex curved shape enlarges and distorts the reflection, which can further increase the deterrent effect.

Versions

• 180° mirror for A4

• 180° mirror for US Letter

• 360° mirror for A4

• 360° mirror for US Letter

Materials

Mirror cardboard paper:

• Size: A4 or US Letter

• Weight: approx. 250 g/m² (92 lb)

Printing Notes

For outdoor use, PETG is recommended.

• Standard print settings

• No supports needed

Build plate note:
The A4 180° version is a very tight fit on 220 × 220 mm printers.
Rotate about 47° or scale down a few percent (mirror paper may need trimming).

Weatherproofing

• Laminating (best option) or

• Sealing the back with clear varnish. For this option best to seal the bottom edge with silicone to prevent moisture entering.

Assembly / Gluing

• Slide the paper into the grooves and glue it in place.

• UV clear resin glue works very well (hardens within seconds).

• Tip: Press the center into shape with tape or a rubber band until the glue sets to avoid bulges.

• For the 360° version, pre-bending the paper and taping the inner seam can help.

• For better stability in windy conditions, mount the mirror onto a heavier base (e.g. a piece of wood). M3 screw holes are included.