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Large Milkweed Bug

Oncopeltus fasciatus


Bright red and black bug about 1.5 cm long. Apparently their color warns predators that they are toxic and taste bad since they eat the seeds of milkweed plants which are also toxic.


These two were found in a dry urban garden on a milkweed plant. "It ranges from Central America through Mexico and the Caribbean to southern areas in Canada."

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Ava T-B
Spotted by
Ava T-B

San Diego, California, USA

Lat: 32.72, Long: -117.11

Spotted on Oct 30, 2019
Submitted on Oct 31, 2019

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