This bug has a reddish brown tint, ranging in size to grow as big as a half an inch in length. These bugs can be easily identified from others by a triangle marking on their backs. 

These pests derive their name from laying eggs in elm trees. Once these young elm seed bugs are hatched they will move into the gutters and under the siding of homes. Those that are able to sneak inside will move up to the attic, creating nests. While these pests are unpleasant for a number of reasons, one of the greatest is their foul smell. This stench is only increased when the bugs are squashed. Unlike other insects, elm seed bugs can live a long time, usually around five years. This means an infestation when not properly taken care of will fester and grow over time, only leading to more problems.