The dual entries BH was officially launched about three to four months ago.
The owner cut down nearly all those trees and shrubs. The whole area was also protected with cement walls about 6 feet tall.
I was impressed with the amount of money being put into getting the land cleared.
She now planted a number of durian trees.
Coming back to the BH, remember that this was the only BH that I erected using the dual entries concept.
My idea came from this unique idea on how to ensure that every swiftlet that visited this dual entries BH will have what they wish to enter.
I have this strange opinion that if a bird was hatched and raised in a top entry BH he or she will have difficulties to enter a BH that has the side entry entrance hole.
Likewise if a young bird was raised in a side entry type BH he or she will have difficulties to enter a BH with top entry type BH.
My main reason being:
Once they reached 45 days old they will take their maiden flight and will fly out of their house with their parent.
Since this is their first day to take flight they will get tired and will return home to rest.
This is how they will fly in and out of the entrance hole to get used to the flying pattern from their nest out and from outside into the BH.
They will memories the distance from the entrance hole to the door, from the first door to the second door and after entering the second door may be 45* to the left before reaching their nest where they were hatched.
This familiarization operation will take at least one to two days during the beginning part of their flying life.
So when they got used to the method to fly into their BH they might have difficulties to enter any new BH if they are not of similar configuration.
Those that were raised in a top entry type BH will have difficulties to enter a side entry type while those that were hatched and raised in a side entry type BH will have difficulties to enter a top entry type BH.
If this philosophy is right the best for option for you to adopt is to have both type of entries. DUAL Entries.
Dual entries have another interesting benefit.
If there are two or three groups or colonies of birds. They are very territorial and will fight until death to defend their house/cave.
How do you segregate them?
The answer is have two or more entrance holes.
You might not like the above explanation but just think about it and keep it in your mind.
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