I am not trying to make you feel discouraged or angry with any bad decisions you made on your BH LAL location.
Not: LAL refers to the connecting hole or door between the higher floor and the lower floor.
It you have made the right choice in selecting the proper location to open the LAL you might want to know that those birds will have the final say.
For the new BH at Salak Tinggi Sepang Selangor I wish to share my problem with the exact thing about pulling them into the LAL.
Yesterday during my free time (I am having a small fever and running nose after returning home from Kemaman) I dropped by to change the external sound at Salak Tinggi.
The owner installed a three channels CCTV camera and I was using it to know how many birds will enter the BH with a few different sound.
Tried a few and the best for this BH with a lot of birds entering was the "Marvelous Cloud" and "Super Vacuum" .
They entered the roving room and started to head towards the door connecting the room to the nesting area.
They came in and flew above the LAL.
Yes the LAL was right below where all the birds will fly inside and outside.
What disappoint me was that not a single bird came downstairs.
All seems to fly to the back of the top floor and none showed any indication of flying to the lower floor.
This can be a good lesson to all about how important is the selection of LAL in your BH.
Remember even you put it at the right location with 100% birds flying above it does not mean that any will fly downstairs.
Just imagine if you select a wrong location?
It will be a bigger disaster.
The only thing that I think can make them to come done are the followings:
1) Give them a few more weeks and see if they will start exploring the lower floor.
2) Control the sound volume of the lower (louder) floor and the upper floor (lesser volume).
3) Try to have a separate cable line for tweeters installed around the LAL frame. If you do try to get the external sound louder.
4) The last resort is to erect an enclosure (temporary) around the LAL and force the first batch of birds to the lower floor. This would mean that your BH is not opened in total but only the lower floor.
I add a few more ideas but for the moment the above are something that might activate you mind to think of any other ways to lure those birds to the lower floor(s).