What you’ll make
A simple, weatherproof wooden box for possums to nest in. It’s designed to be mounted on a tree or post and kept safe from rain and predators.
Materials
- Untreated exterior plywood or hardwood boards (about 18–22 mm thick)
- Two hinges and a small latch or hook-and-eye for a clean door (optional: a hinged front panel for easy cleaning)
- Exterior wood screws (stainless or galvanized) and waterproof wood glue
- Wood filler or sanding block (to smooth rough edges)
- Sandpaper (medium and fine grits)
- Paint or stain with a wildlife-safe, non-toxic finish (optional; ensure it is safe for animals)
- Ventilation holes (small, about 1 cm diameter) and a drainage hole at the bottom
- Polyurethane sealant or weather seal (applied only on the exterior, not inside)
- Mounting hardware: metal strap or brackets and a tree-friendly mounting method
Dimensions (approximate, for an adult brushtail possum style box)
- Exterior box size: about 40 cm high × 26 cm wide × 26 cm deep
- Interior space: roughly 28 cm high × 22 cm wide × 20 cm deep
- Entrance hole: about 8 cm diameter, located about 15–18 cm below the roof
- Roof overhang: at least 5 cm around all sides to shed rain
Tools you might need
- Measuring tape or ruler
- Pencil for marking
- Saw (preferably handled by an adult or teacher)
- Drill with appropriate drill bits
- Screwdriver
- Clamps (optional, helps hold pieces while screwing)
- Sandpaper or a sanding block
Step-by-step assembly
- Ask for permission: Check local wildlife rules and get an adult’s help. Do not disturb any wild possums you might find nearby.
- Cut the wood: Have an adult pre-cut the back, two sides, a bottom, a front panel, and a roof piece to the sizes listed above.
- Sand edges: Smooth all rough edges to prevent splinters and to help the sealant last longer.
- Make holes: Drill 1 cm ventilation holes near the top of the back panel (two or three are fine) and a drainage hole at the bottom of the box.
- Assemble the box: Attach the two side panels to the back panel using screws and wood glue. then attach the bottom panel. Finally, add the front panel (with the hole) and secure with screws. If you’re using a hinged front, attach the hinge to the top edge instead of the full panel.
- Install the roof: Attach the roof piece with a slight overhang so rain slides off. You can use small screws or a hinge to make the roof removable for cleaning.
- Seal the outside: Apply a wildlife-safe exterior finish or paint to the outside only. Let it dry completely before mounting.
- Finish touches: Use a small piece of wood or metal predator guard around the entrance if you want extra protection from rain and debris (optional).
Mounting the box
Choose a sturdy tree trunk or a post mounted securely in the ground or on a building. Place the box at about 2–3 meters (6–10 feet) above the ground, away from direct wind and heavy sunlight. Face the entrance away from prevailing winds if possible, and avoid locations with heavy human traffic.
Care and safety tips
- Only adults should handle the box and possums; never attempt to remove a possum yourself.
- Check local wildlife regulations before installing or inspecting a possum box.
- Inspect the box once a year for damage, leaks, or loose screws. Re-seal if needed.
- Avoid using harmful chemicals inside or near the nesting space.
What to do if you see a possum
Be patient and observe from a distance. If the possum seems sick or injured, contact a local wildlife rescue or your teacher for guidance. Do not try to feed or remove the animal yourself.
Important reminders
- This project is for learning and habitat support. Do not trap or relocate wild animals without professional guidance.
- Always work with an adult when using tools and handling wood materials.