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Sticker of Giant dobsonfly
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Giant dobsonfly

Acanthacorydalis fruhstorferi
Name means: “Acanthacorydalis probably means thorny helmet crest, and fruhstorferi honours the insect scientist Hans Fruhstorfer”
Eats: PlantsOther insectsPonds, rivers and shores6 legs

The giant dobsonfly is a huge insect with big, see-through wings and strong jaws. It lives near clean rivers and streams in China and Vietnam. With wings opened wide, it is the biggest water insect in the world.

Lives in
Southern China and northern Vietnam, near clean streams and rivers
Wingspan
22 cm (8.5 in)
Top speed
about 9 km/h (5.6 mph)
Flying, estimate
Can it hurt you?
Harmless
It is not known to hurt people. The grown-ups only drink sap and do not hunt.
What does it eat?
The grown-ups only drink tree sap. Its larvae live in the water and are fierce hunters of water insects, baby frogs and small fish.
For real!Photo of Giant dobsonfly
Picture by Theo Busschau. CC BY 4.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Giant dobsonfly wings about 22 cm tip to tip (8.5 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)A house cat about 50 cm (20 in)
wings as wide as your handcould fly across a whole football pitch in 42 seconds

How big is Giant dobsonfly compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Its wings measure 21.6 centimetres from tip to tip. That earned it a world record as the biggest water insect.

2

Before it, the record belonged to a damselfly from Brazil.

3

The mother lays her eggs between stones next to flowing water.

4

Its larvae need very clean water. Where rivers get dirty, they disappear.

5

The grown-ups love light, so people often see them sitting near lamps by the water.

you asked

Most asked questions about Giant dobsonfly

?How big is the giant dobsonfly?

Its wings reach 21.6 centimetres across, a world record for a water insect.

?What does the giant dobsonfly eat?

The grown-ups drink tree sap. The larvae in the water eat insects, baby frogs and small fish.

?Where does the giant dobsonfly live?

Near clean streams and rivers in southern China and northern Vietnam.

For bug experts

Scientific name
Acanthacorydalis fruhstorferi
Named by
van der Weele, 1907
Group
Other insects
Family
Corydalidae
Classification
Insecta > Megaloptera > Corydalidae
Lives on
Asia
Also known as
Giant Chinese dobsonfly

Where the facts come from

  1. Acanthacorydalis fruhstorferi (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 Theo Busschau. CC BY 4.0, 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 hello@bugwiki.app and we will fix it.

More from the same group: Other insects

Also at home here: Ponds, rivers and shores