Last week went in a standalone BH in agriculture land to check the result after turning on the sound for 2 months plus. I found 10 bird nest based markings, some at level 2 and some at level 3. Level 1 has few spots of droppings, hopefully next round check will find some nest base here. Most of the nest markings are built on the tweeter. This is to prove that the internal sound is favour by the swiftlets. Please enjoy the pictures taken during my visit. I applied those experience I gained over the years to this BH.
I hope to have at least 100 full cup bird nests when reaching 1 year.
