I think I have discovered another type of figs tree that might be a good source for those insects.
The tree generate red coloured fruits and when ripe it turned black.
I called it as "The Malaysian Cherry".
While driving out from my in law's house yesterday I passed by a school and just about 100 meters away I was surprised to see so many swiftlet circling on a tree.
At first I thought it must be those termites or red ends flying out of their nests since it was after a heavy shower.
Since I was rushing to meet some one in Penang I ignored the whole thing.
Well this morning when I woke up, my mind was again keep thinking about those birds on that particular tree.
I was curious and keep asking myself that there must be something that were making those birds circling above that particular tree.
Without taking any breakfast I sneaked out of the house and drove to the same tree.
In my mind I was thinking that if there are no more birds on the same tree than there was some flying insects that was coming out of the ground yesterday.
However if those birds are still flying above the tree until today than there are insects generated from the tree it self.
The moment I reached the site I was very surprised that those birds were still up there on just this particular tree.
Hmm... the tree must be generating those insects.
The only way to explain is to check if the tree is a figs tree.
I plugged a few of the red and black coloured fruits and squeezed opened.
Oh yes the fruit is very much a figs fruit.
Figs fruits have this kind of internal structure that the flower is inside the fruit and those insects have to bore their way into the fruit to pollinate the flower inside.
Once they have pollinated they will lay their eggs in a specially made pods.
So now I have discovered 5 different types of figs trees that can be used as insects generators.
The best is to perhaps get at least two types of these figs trees to be planted around your BH.
The best is to be at the front of your entrance hole area.
Make sure they are not taller than your BH !!!
Main reason why you should plant more than one type is to allow the insect generating period be prolonged/extended thus exposed your BH to more birds in a year.
If your first figs tree type started to generate those fruits in Jan to March and the second figs tree type start to fruit from February to April, if the two fruiting time overlapped you will have a longer period of insects around your BH i.e. January till April.
This will be every year at least once.
Have a look at another video clip and various interesting pictures: