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Sticker of American grass mantis
Bug card No. 0081 of 4,939

American grass mantis

Thesprotia graminis

The American grass mantis is a long, thin, light brown mantis. It looks just like a pine needle or a blade of dry grass. To hide, it stretches its front legs forward and sways from side to side.

Lives in
The southern United States, in grassland, pine woods and thickets
Length
4.7 to 5.6 cm (1.9 to 2.2 in)
Top speed
about 0.97 km/h (0.6 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It is a hunter of small insects only.
What does it eat?
It hunts flies, moths and other small insects. The grown-ups especially like big flies and small moths.
For real!Photo of American grass mantis
Picture by Shannon. CC BY 4.0, via Wikimedia Commons.

How big is it?

How long is it?

American grass mantis about 5.6 cm long (2.2 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
as long as 9 grains of rice in a rowas long as 2 toy building bricks in a rowcould run across a dinner table in 3.7 seconds

How big is American grass mantis compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Only the grown-up males have wings. The females never get any.

2

Some females can have babies without a male.

3

The mother lays her eggs in a foamy blob that hardens into a tough little case.

4

Its babies look like tiny copies of the grown-ups, just without wings.

5

Among pine needles it is so well hidden that it is very hard to spot.

you asked

Most asked questions about American grass mantis

?Is the American grass mantis dangerous?

No. It only hunts small insects and is harmless to people.

?How big is the American grass mantis?

It is usually about 5 cm long, and sometimes a bit longer.

For bug experts

Scientific name
Thesprotia graminis
Group
Mantises
Family
Thespidae
Classification
Insecta > Mantodea > Thespidae
Lives on
North America
Also known as
Grass-like mantis

Where the facts come from

  1. Thesprotia graminis (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 Shannon. CC BY 4.0, Wikimedia Commons. The sticker of this bug is drawn from this 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.

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