In Wallonia, more than 350 species of bees, including bumblebees, andrenes, osmises, halictides, etc. can be found in our gardens, meadows, woods, etc. By foraging on flowers, these wild bees contribute to the reproduction of wild and cultivated plants and are therefore a valuable aid to gardeners and farmers. An essential link in the chain of biodiversity that we must protect, here are a few that are very common in our gardens.