Get inspired to attract hooded mergansers and wood ducks to your area with these easy-to-make DIY nest box plans. They work best where these ducks love to nestβ€”wooded wetlands, riverbanks and shorelines.

Both species are secondary cavity nestersβ€”meaning they can’t create their own nest hole in a tree like a woodpecker can, so they rely on pre-existing holes. These may be made by other species or created by natural processes of decay or limb breakage. They also readily use built nest boxes. 

Here are a few tips on placement and construction:

  • Recess the bottom ΒΌ-inch so rain doesn’t seep across the floor into the nest.
  • Install nest boxes near, or over, water.
  • Use naturally rot-resistant cedar lumber
  • Add hardware cloth inside below the hole so young can climb out
  • Add 2 to 3 inches of wood shavings to the bottom of the box.
  • Clean shavings out annually and add new wood shavings
  • Place box 4 to 6 feet high on a pole, post or tree with box opening facing water.
  • Use 10- or 12-inch-wide lumber. Increase nest success with a predator barrier attached to box poles using metal conical guards, slippery plastic or other barriers.

From the Spring 2018 issue of Iowa Outdoors magazine
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