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Sticker of Red-shouldered bug
Bug card No. 1147 of 1,500

Red-shouldered bug

Jadera haematoloma
Eats: PlantsTrue bugs and cicadasGardens and meadows6 legs

The red-shouldered bug is a black bug with red eyes and red edges on its shoulders. It has a long, thin beak like a drinking straw. It pokes the beak into seed pods to reach the seeds inside.

Lives in
The United States south to Colombia and Venezuela, and now also Taiwan
Length
0.9 to 1.4 cm (0.37 to 0.53 in)
Top speed
about 0.21 km/h (0.13 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not sting and is no danger to people.
What does it eat?
It sucks the juice from seeds of soapberry plants and their relatives, like the balloon vine and the goldenrain tree.
For real!Photo of Red-shouldered bug
Picture by Louis J Bradley. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Red-shouldered bug about 1.4 cm long (0.53 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
as long as 2 grains of rice in a rowcould run across a dinner table in 17 seconds

How big is Red-shouldered bug compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

The babies are mostly red with a black front, so they look quite different from their parents.

2

You often see two bugs joined tail to tail. They can stay like that for about two days.

3

In Florida some of them started eating seeds of a new tree with smaller pods. In just a few decades their beaks got shorter to fit.

4

Right after it sheds its skin, it is bright red for a little while.

5

People often mix it up with boxelder bugs.

you asked

Most asked questions about Red-shouldered bug

?Are red-shouldered bugs harmful?

No. They do not sting or bite people, they just suck juice from seeds.

?What do red-shouldered bugs eat?

Seeds of soapberry plants, like the goldenrain tree and balloon vine.

?How big is the red-shouldered bug?

It is about 9.5 to 13.5 millimetres long.

For bug experts

Scientific name
Jadera haematoloma
Group
True bugs and cicadas
Family
Rhopalidae
Classification
Insecta > Hemiptera > Rhopalidae
Lives on
North America, South America, Asia
Also known as
Goldenrain-tree bug, Soapberry bug

Where the facts come from

  1. Jadera haematoloma (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Louis J Bradley. CC BY-SA 3.0, Wikimedia Commons. The round sticker of this bug is cut from the same picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

More from the same group: True bugs and cicadas

Also at home here: Gardens and meadows