Elm Leaf Beetle

Found primarily on or near elm trees; they often enter buildings and homes during late summer or fall seeking shelter for overwintering.

Adults and larvae feed exclusively on the foliage of elm trees (Ulmus spp.), causing skeletonization of leaves.

They undergo a complete metamorphosis. Adults emerge in spring to lay eggs on leaves; in winter, they hibernate in dry, protected areas like attics or under bark. They are attracted to light.

They are a significant pest to elm trees, potentially defoliating and weakening them. They are a nuisance in homes but do not bite humans, spread disease, or damage household structures.