
Striped plant bug (likely milkweed bug)
Oncopeltus fasciatus
- Order & Family
- Hemiptera; family Lygaeidae
- Size
- Adults are typically 10–13 mm long.
Natural Habitat
Open sunny habitats containing milkweeds, including meadows, roadsides, gardens, and shrub vegetation. This individual appears to be resting on foliage.
Diet & Feeding
Nymphs and adults pierce seeds, fruits, and other tissues of milkweeds, especially common milkweed (Asclepias syriaca), and sometimes related plants. They may also consume nectar or dead insects opportunistically.
Behavior Patterns
Adults and nymphs often cluster on milkweed, particularly around seed pods, and produce several generations in warm regions. Adults can fly, overwinter in sheltered sites, and display conspicuous red-orange-and-black warning coloration.
Risks & Benefits
They are not dangerous to humans and rarely cause significant garden damage. Their feeding can reduce milkweed seed production, while their conspicuous coloration reflects chemical defenses acquired from milkweed and they serve as prey for other wildlife.