This simple bird box is suitable for tits and other small birds.
1 Length of untreated timber 100mm x 1050 mm
1 smaller piece of untreated timber 200mm x 150mm
approx 2 dozen screws to fix the box together
1 hinge for the lid
First mark out the larger piece of timber and cut to size.
Drill the 25mm diameter entrance hole in the front panel.
Assemble as shown and screw together.
Attach the lid with the hinge as the last picture shows, and your bird
box is ready for fixing to a tree.