Nannotrigona sp. Image from my personal collection
These tiny bees are stingless bees. There are many species of these little insects. According to the species, they differ in size, color, type of nest and so on. You might have some of them close to your house.
They are very common in the intertropical region.
It is possible to attract them to an adequate shelter (please search in the web for that purpose, make sure not to destroy them because they play many important roles in nature among others, there are plants that cannot produce seeds without their specific stingless bee) and make it possible to collect their honey even for commercial purposes. Their honey is very appreciated in some places not only because of the variety of flavors but because of their medicinal properties.