Eastern Boxelder Bug
Boisea trivittata
What it is
The boxelder bug (Boisea trivittata) is a North American species of true bug. It is found primarily on boxelder trees, as well as maple and ash trees. The adults are about 12.5 millimetres (0.49 in) long with a dark brown or black colouration, relieved by red wing veins and markings on the abdomen; nymphs are bright red.
Where and when to find it
- Habitat
- You can find them all across the United States. They often live near boxelder, ash, and maple trees.
- How to find it
- Look on the sunny sides of buildings, fences, and tree trunks, especially in the fall and early spring. They like to warm up in the sun.
- Best time of day
- Fall and early spring, especially on sunny afternoons.
How it lives
- What it eats
- Juices from seeds of boxelder, maple, and ash trees.
- What eats it
- Birds, spiders, and other insects.
Worth knowing
- They are attracted to light-colored surfaces and warm places.
- Adult boxelder bugs can fly.
- Their red markings are a warning to predators.
- Sometimes, many of them will gather on one tree or house.
- They don't bite people or pets.
- Their scientific name 'trivittata' means 'three-striped'.
Why it matters
Boxelder bugs help break down old plant material. This makes the soil healthier for new plants to grow.