40% of all pollinators like bees and butterflies are threatened with distinction; this could have a drastic negative impact on biodiversity. But it also impacts humans directly; roughly three-quarters of or agricultural products are dependent on these pollinators. Without pollination there won’t be any crops, without crops there won’t be any food. The last decennium there was a lot of international attention for the honeybee because whole colonies would disappear without nameable cause, the so-called Colony Collapse Disorder. Less known is the fact that solitary bees in the wild are also facing distinction. Solitary bees live by themselves; the searching for food, preparing a nest and laying of the eggs, they will do everything in absence of others. In the Netherlands and Flanders alone there are 360 known species of solitary bees, of which no less than 56% are on the Red List of endangered species.