Building a wood duck house is only the first step. Proper wood duck house maintenance keeps the houses productive year after year. The houses described in Build a Better Wood Duck House are designed to make this maintenance easy.
Every fall, after the young birds have fledged, houses should be inspected, cleaned, and repaired if necessary. The work only takes a few minutes per house but makes a big difference in whether the house will be used again the following spring.
We do the maintenance in the fall after a killing frost so we are not dealing with angry wasps and hornets. By that time the nesting season is over and the houses can be safely cleaned.
Over the years I’ve helped maintain a large number of houses, and the same basic process works whether you have one house or one hundred.
Why Annual Maintenance Matters
Unlike many birds, wood ducks do not bring nesting material into the house. They rely entirely on the wood shavings that are placed inside the box.
During a nesting season the house can accumulate:
- compacted wood shavings
- eggshells
- feathers
- unhatched eggs
- debris from other animals
Not every house will be used every year. Occasionally a duck will start nesting and then abandon the nest. Birds or squirrels sometimes move in and take over a box as well. For these reasons it is important to check every house every year, even if it appears unused.
Cleaning the house each fall ensures that the cavity is ready for the next nesting season.
Basic Wood Duck House Maintenance Steps
Annual maintenance is straightforward and usually takes only a few minutes per house.
Typical steps include:
- Inspect the house
- Check the roof, sides, and mounting. – Look for loose boards, missing screws, or other structural problems.
- Open the clean-out door
- Remove old nesting material. – Dump out old shavings, eggshells, feathers, and debris.
- Check for animal nests. – Mice and other small animals frequently move into houses during the off-season.
- Add fresh wood shavings. – A few inches of clean wood shavings provide the nesting material wood ducks need. Do not use sawdust, since it can smother chicks.
- Secure the maintenance door. – Make sure the door is firmly closed after maintenance. Remember to open it again in the spring before nesting season.
- Clear brush around the house. – Trim any small trees or brush that may provide predators easy access.
Once the door is secured, the house is ready for the next season.
Common Problems Found During Maintenance
While many houses only need cleaning, it is common to discover problems during annual inspections.
Some typical issues include:
- missing or damaged roofs
- loose mounting brackets or posts
- rotting wood
- predator damage
- hornet or wasp nests
- animal nests inside the box
Many of these problems can be repaired quickly in the field with basic tools and spare parts.
Repair or Replace?
Wood duck houses can last many years if they are built well and maintained properly. However, eventually wood deteriorates and repairs become less practical.
When a house has been repaired multiple times or the wood has become badly deteriorated, replacement is usually the better option. Replacing older houses also provides an opportunity to install improved designs that are easier to maintain and more resistant to weather and predators.
Safety Tips from Experience
A few lessons learned over the years:
Wear gloves when reaching into a house. – It is very common to find mice living in wood duck houses during the off-season.
Be careful with unhatched eggs. – Old eggs can be extremely rotten and will break easily if handled roughly.
Expect surprises. – In addition to mice, houses sometimes contain other animals. Over the years we have found everything from owls to possums occupying nest boxes.
A little caution goes a long way toward avoiding unpleasant surprises.
Video: Wood Duck House Maintenance
The following video shows several typical maintenance scenarios including inspection, cleaning, repairs, and replacement.
Summary
Annual maintenance is one of the most important steps in maintaining a successful wood duck house program. Cleaning the houses, replacing nesting material, and repairing damage ensures that the boxes remain attractive nesting sites for many years.
If you want to build wood duck houses that are durable, easy to maintain, and designed specifically for wood ducks, the book Build a Better Wood Duck House walks through the entire process.
Additional resources related to the book — including videos, updates, and related articles — are available on the Wood Duck House Online Resources page.