Plus married matured birds usually won't chase each other
Due to this , you cannot jump start the crowd effect
Hii lots of consideration my friend.. Base on my years of experience it is hard for one sound to cover all purpose
When we use one sound.. Once the mating loop reach repeatation loop . Or internal birds colony sound. The mating birds lost it interest ..
All in all, u need to combine at least 2 or 3 sounds if u ever want to jump start a low population bh.. Note this consideration only applicable to standalone bh
Bh with many surrounding bh , the type of sound choices is different