The owner of this BH located somewhere in Kodiang, Kedah complained that his BH nests growth are not so good.
I was invited to visit the BH last week and have a long talk with him and wife about his BH.
After about 45 minutes viewing externally and internally I told him that his BH is doing very well as compared to many others.
"Pak Harry don't you think that the growth is slow? Only 200 after two years is bad, isn't it?" he asked.
My rule of the thumb for a new BH is to get 100 nests during its first year of operation and subsequently the nests should multiply by 2 every year.
In his case after 2 years it went up to 200.
I told him that he is a very lucky person and try not to raise his expectation too high.
There are many BH owners who are not even with 10-20 nests after 4 years of operation.
What excite me most was how his BH can do so well and based on his description most of his nests were at the ground floor.
Something must be right about this BH.
What I discovered were very interesting and how I wish more BHs have some features like his.
One main reason why his BH was doing pretty well is the installation of external sound tweeters in his nesting rooms.
Each floor has about 6 sets of external sound tweeters.
Each set consisted of two pieces of 2"X 5" tweeters.
They were placed in the middle of each beam box.
These external sound sets must be drawing those birds into the house and move them to the back.
However I do have some concerns about the following things:
1) All his ventilation holes were not with any extension pipe. Internally they ended with a 90* elbow each. The amount of light from these elbows were causing bright areas.
2) There was not a single room on any of the three floors. I told him to consider erected at least a room per floor.
3) Nearly all his 200 plus nests were 90* shape. Very few were making those 180* shape.
4) The main entrance hole was with no owl prevention system. I recommended those electric wire system.
5) There were many saliva markings at those 90* corners. I told him that he should have install those polystyrene foam fake nests on each of these corners. I was referring to my NKS system.
6) There is a very strong indication that his BH was too dry. He do not operate any humidifier at the moment. I pointed to him about 3 years BH syndrome. If he is not careful those young birds generated inside his BH will not return home due to dryness. He should get ready to face the dry BH syndrome.
7) His BH hexagonal tweeters was DIY with two 2" x 5" tweeters facing the front and another two facing the back. What about the two sides?
(DIY hexagonal tweeter with only 2 facing the front and two facing the back)
9) One very strange observation was the little number of nests found on the middle floor. There were less than 20 pieces and I think he should list down all the things which can be done to lure more birds to this particular floor. One idea was to create a VIP room at the end of the nesting room. My second idea was to perhaps rewire the internal sound tweeters and perhaps later run them at a louder volume.
Well I sincerely hope that he will follow some of my comments and recommendations.
However at the moment his consultant is doing a pretty good job with some new sounds changed recently.
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