One of my strange ability is to discover new things that can help to populate any BH.
Many are in the form of gadgets while some are good sounds and some of it in a whole system.
My newest and latest is a product I called it as "Chocolate Bar" tweeters.
It is made of 4 X 2"X5" tweeters arranged in a single row.
This newly discovered gadget is proven to be very good in leading your tenant from the entrance hole to the selected areas where you want them to stay.
It is something like those guide lights you see on the airport runways.
When a new bird entered you BH they have no idea where to go but if you are smart you can pull them to any part of your nesting rooms using these "Chocolate Bar" tweeters.
All that you need to do is to install a row of these Bar tweeters in a row starting from where the birds enter your BH and ended at your selected location.
Try not to have too many selected locations.
For a beginner try only one set. Chose a location which you know the birds have difficulties to reach that location. My best recommendation is the middle floor at the furthest sport in one of the two VIP rooms.
Lay one Bar every 5 feet until the final destination.
At the final destination you need to put maybe 2-3 more of this Bar tweeters.
Remember you need to connect the wire of all these tweeters to your external sound amplifiers.
Use the right volume to get those birds to be attracted to the sound.
Let it run for about 3-5 months and see what happen.
Trust me this new idea will work and you can then try to expand the use of this Bar tweeters technique in pulling those birds to any spots that you wanted them to be.
If you should try and it works please share your experiences plus photos.
Send it to firstname.lastname@example.org.