We hear a common argument or question about raising hole-nesting bees: In nature, these bees nest in holes in wood, why don’t I just leave them alone? The nesting holes we are providing for bees in our bee hotels and bee houses are really different than the nesting holes found in nature. We can't build a completely natural situation for our hole-nesting bees, who are wild creatures after all, so we need to learn to maintain our man-made houses for managed wild bees.