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Project Noah Nature School
Oncopeltus fasciatus
The large milkweed bug adult is a 9–18 mm long insect. Mature adults are orange with black rhomboidal spots at both end of a body and a black band in the middle. Freshly molted individuals are pale yellow with gray spots that change into black with time. Bright orange instars resemble adults, with orange-black pattern different than in grown individual and without wings. However, wingpads are visible and become more pronounced with each molt. Adult females have several black spots on rear part of their abdomen, while males have only one.
A few were on the milkweed leaves and blooms.
Spotted on May 25, 2013
Submitted on May 26, 2013
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