Without the common paper wasp such as hornets and yellowjackets that make the nests that hang from our eaves,  we wouldn’t have such extravagances as ripened grapes for the making of wine and bread.  That’s because the wasp in addition to its spidery and insect-ful diet also loves a good juicy bit of fruit on occasion. In doing so, they ingest the wild yeast which will survive the winter freezes in their digestive tracts while the wasp hibernate.  Upon emergence the following spring when the wasps goes out for its juicy snack the yeast in its tract will be reintroduced into the wild.