BH after 2 weeks of operation

Called my bird house caretaker today. He said that he saw some swiftlets flying in and out the bird house. Inside the bird house he saw some bird shit on the ground but the amount of shit is not enough to indicate that the birds have stayed overnight.

Swiftlets will usually visit the bird house and play around but it will take a while before they decide to stay overnight.

I have placed insect powder near the entrance hole to attract the swiftlets. The insect powder is a mixture of insect eggs and food. After adding some water, the insect eggs will start to hatch and produce maggots. After a few weeks, it will turn into flying insects and start to fly around the entrance hole. Swiftlets will be attracted by the insect and come into the bird house.

Sometime the flying insects might attract other types of birds to come into the bird house too!