While flowering plants offer food to pollinators, insects also need proper shelter for nesting and overwintering. Why natural Is bestThe availability of nesting and overwintering habitat is one of the most important factors influencing populations of native bees and beneficial insects. A well-managed wildflower patch, for example, can offer pollen and nectar, nesting spots for bees, overwintering habitat and host plants for butterflies, and food for birds. Here are some steps to create nesting and overwintering habitat. By preserving natural elements, like stems, leaves and undisturbed ground, we create vital nesting and overwintering habitats that support a rich diversity of pollinators and other beneficial insects.