Capitol Corridor
University of California
Capitol Corridor

What's Bugging You?

What's bugging you?



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This true bug is about 1/2" inch long, somewhat flat, elongated oval, black with lateral red markings. The nymphs look similar and are typically red with black pronotum and wings. They do not sting, transmit diseases and seldom bite. When kill or crushed they do not emit a foul odor. They are often mistaken for the Boxelder bug.  

They are not known to cause damage to plants or vegetables and are usually considered a beneficial insect. They eat fallen seeds, other dead bugs and leaking tree sap. Their fancy seeds from the Golden Rain Tree (Koelreuteria paniculate). Using their beaks, nymphs and adults pierce the tough seed coats and probe the nutritious meat of the seed. Their digestive enzymes are pumped into the seed and break down the protein, fats and carbohydrates. Once liquified, these nutrients are sucked up their beak and into their gut, where it's converted into proteins. They can be seen year around in warm areas, such as California. They like to hang out in leaf piles, stacks of wood, rock piles and green plants.

They are known as the:

Red Shouldered / Soapberry / Golden Rain Tree Bug  (Jadera haematoloma)


Posted on Tuesday, March 24, 2020 at 10:45 AM

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