Did you know that bumblebees often nest in piles of debris, sticks, leaves, and mulch? Not only do they create nest sites in debris, but many queens hibernate and overwinter in leaf mulch and stick piles. To provide shelter for these queens, consider leaving fallen leaves in your yard, or piles of debris in areas of your property where they can lay undisturbed for a season. Watch as this Bombus vosnesenskii queen shuffles around and checks out this space for a potential nest site in the Spring.