| Scientific name | Oncopeltus fasciatus |
|---|---|
| Group | True Bugs |
| Size | 10–18 mm (up to about 0.71 in) |
| Colors | Orange and Black |
| Legs | 6 legs |
| Wings | Yes |
| Where found | Garden or plants |
| Most active | Summer |
| Bites | No |
| Stings | No |
| Risk level | Harmless |
How to identify it
The large milkweed bug is a medium-sized member of the true bugs group. Piercing, straw-like beaks and wings that overlap in an X on the back. Check for these three features:
- Orange body with a black band across the middle of the back
- Black diamond shape near the wing tips
- Gathers in groups on milkweed pods
About this bug
A bright orange-and-black bug that feeds on milkweed seeds in clusters of adults and nymphs. Its colors warn predators that it tastes bad.
You'll usually find large milkweed bugs in gardens and on plants. They are most active in summer.
Is it dangerous?
Large milkweed bugs are harmless to people and don't damage garden crops.
Our rating: Harmless, meaning it poses no real threat to people, pets or property.
When you'll see large milkweed bugs
Large Milkweed Bugs are most active in summer. Summer heat speeds up development, so populations can grow quickly.
Typical places to check: garden or plants.
About true bugs
The large milkweed bug is one of the true bugs. True bugs have piercing, straw-like mouthparts used to suck plant sap or, in a few species, blood. They develop through gradual metamorphosis: nymphs look like small, wingless adults and molt several times as they grow. Many release strong odors from scent glands when threatened.
Because nymphs look like adults, you'll often see mixed sizes of the same bug together, which is a good sign that a population is breeding nearby.
Should you get rid of it?
No control is needed. Large Milkweed Bugs are not pests, and many help by eating other insects or pollinating plants. If one is indoors, move it outside with a cup and a sheet of paper.
Bugs that look similar
Size: Large Milkweed Bugs are larger, reaching 18 mm, while boxelder bugs top out around 14 mm.
Frequently asked questions
What does a large milkweed bug look like?
Orange body with a black band across the middle of the back. Adults measure 10–18 mm (up to about 0.71 in).
Does the large milkweed bug bite or sting?
It does not bite. It does not sting. Large milkweed bugs are harmless to people and don't damage garden crops.
Where do large milkweed bugs live?
Large Milkweed Bugs live in gardens and on plants.
When are large milkweed bugs most active?
Mostly in summer.