If you face problems where the birds do come over and play above your roof top but they refuse to enter your BH, you should consider to playing the external in your roving areas.
This was one of the item discussed with one of my blog reader a few days ago.
"Harry, those birds do fly over the roof top but they never enter the BH. How can I pull them into the house?"
My answer: Why don't you play the same external sound in your roving area?
I have visited a number of BHs in many towns. Each BH have their own set of design and characteristics.
Most of them are plain simple with little know how about swiftlets.
However there are BHs that are simply gorgeous. They include techniques that make more sense then any others.
This guy in Segamat,Johore, dedicated the whole top floor to be his birds roving areas. He uses all the floor space for those birds to fly around before moving to their nesting rooms downstairs.
He play the external sound on the top floor (roving area) and it works. According to him, when those birds listen to those external sound they tend to follow where the sound comes from.
First they will circle the roof top. This first move is likely to investigate the source of the sound. If they see any entrance hole they will make their move to enter the hole.
The moment they crossed the tweeters playing the external sound at the entrance hole they will be dragged into the roving room. This is where the external sound played inside the roving areas will take over from those tweeters outside the entrance hole or at the entrance hole.
If there are no sound after their entry, they will normally turn back and fly out or lock themselves to the tweeters at the hole.
The idea to place those external sound in the roving room do play a very important role in pulling the birds from your rooftop into the house.
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