I have transformed a normal waste wood corners into something new.
My main idea is to create additional type or place for swiftlet to build their nests on it.
With this new invention the birds will have the choice of building their nest at 90* angle, on the top of the half curved corner, two additional spots for the 130* nests areas.
Yes from a two nesting spots on the conventional waste wood corners we now gives those birds four.
What you need is a piece of normal left over nesting plank about 6 inches long and a curved corner cover cut into half.
Nail the curved corner onto the waste wood cover and install onto your nesting planks.
Choose the perimeter areas as your main target.
You can use this technique on a single waste wood corner or you can use two curved corners on on waste wood.
The next idea is to deploy the half curved corner covers on those nesting planks crossed points.
The idea is to create an additional location for those birds to build their nest on it.
Have a good look at these pictures and try them out.