What do you think the most probable reasons why in some places there are no swiftlets or very little swiftlets in the area?
I was in Tamparuli, Sabah the other day and it was very funny that the place was with very little number of swiftlets.
I used my Duress sound and there was very few, like three to five birds, responded to those sound.
"Harry what do you think are the reasons why there are not so many swiftlet?".
If you crack your brain a bit you might get the proper answer.
This is the best answer that I come up with:
" To me swiftlet is not a normal birds. One of their weired behaviour is that they will not built their nests anywhere in an open areas, like shopping areas corridors or on trees or on any unenclosed buildings. They do not feel save. They need suitable enclosed areas or buildings or caves."
"In view of this unique behaviour, they need a proper place to breed. "
"If there are no place to breed, there will be little chances for them to propogate. As such your area might be facing the exact problem."
"In the event that your area have lots of food, they will one day come and feed here. As such you can built a small unit for them to start a colony but they might take a longer period to fill up your BH."
So if you face the same situation, you need to tell yourself that the reason of the little number of swiftlets is not due to nature but due to no proper place for those swiftlets to breed.
Once they have a proper place to breed they will start their colonies and spread to your new BH.
Hope the above explainations are good enought unless you have a better explainations.....
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