There is a rare species of bee, called Osmia avosetta, which, however, does not like to live and work in a group. Osmia Avosetta is a solitary bee, also called "mason", and has a peculiarity: it uses different flower petals to build complex nests for its larvae. This rare bee therefore works alone to provide shelter for smaller bees.
The mother bee bites the petals of different flowers and brings each petal to the site. The petal is superimposed on other petals in an incredibly orderly manner: the tip down and the widest side of the leaf up. Once the first layer is made, a thin layer of mud is spread and then a second covering of petals is made.
After a deposit of provisions and once the nest is ready, the egg is deposited and the nest sealed. In fact, the nest serves to protect the egg from predators and parasites, and the humidity of the petals would help maintain the water content of the nest and supplies. After a few days, the egg hatches into a larva and is ready to pop out. It can take the bee one to two days to create this nest, which is a small work of art to our eyes.