Bug Identifier
Striped plant bug (likely milkweed bug)
Community identification

Striped plant bug (likely milkweed bug)

Oncopeltus fasciatus

Order & Family
Hemiptera; family Lygaeidae
Size
Adults are typically 10–13 mm long.
See this bug in the Encyclopedia

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.