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Sticker of California darner
Bug card No. 0758 of 4,939

California darner

Rhionaeschna californica

The California darner is a medium-sized dragonfly with bright blue spots on its long tail. The male has big blue eyes and blue or green stripes on the sides of his chest. It is one of the first dragonflies to come out in spring.

Lives in
Western North America, from southwestern Canada through the western United States and Mexico to Central America, near ponds, lakes and marshes
Length
5.7 to 6.4 cm (2.2 to 2.5 in)
Top speed
about 41 km/h (25 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. Dragonflies have no sting, so you can just enjoy watching it fly.
What does it eat?
The grown-ups catch soft flying insects like mosquitoes, flies and butterflies. Its babies live under water and hunt small water animals, tiny fish and tadpoles.
For real!Photo of California darner
Picture by USFWS Mountain-Prairie. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

California darner about 6.4 cm long (2.5 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 2 toy building bricks in a rowcould fly across a whole football pitch in 9.2 secondsmoves 180 times its own body length every second

How big is California darner compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Its babies, called naiads, live under water for several years before they become flying dragonflies.

2

It turns from a naiad into a dragonfly at night, so that birds, frogs and fish cannot catch it while it is still soft.

3

The female lays her eggs on plant stems or floating leaves right at the water's edge.

4

Females have light brown eyes, while males have blue eyes.

5

In California it can be seen flying from February all the way to August.

you asked

Most asked questions about California darner

?What does the California darner eat?

Flying insects such as mosquitoes and flies. Its babies under water eat small water animals, tiny fish and tadpoles.

?Do dragonflies sting?

No. Dragonflies have no sting and are harmless to people.

?How big is the California darner?

It is about 6 centimetres long, a medium size for a dragonfly.

Myth buster

Myth: Dragonflies sting.

Truth: They cannot. Dragonflies have no sting at all. The long tail is just a tail.

For bug experts

Scientific name
Rhionaeschna californica
Group
Dragonflies and damselflies
Family
Aeshnidae
Classification
Insecta > Odonata > Aeshnidae
Lives on
North America

Where the facts come from

  1. Rhionaeschna californica (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 USFWS Mountain-Prairie. CC BY 2.0, 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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More from the same group: Dragonflies and damselflies

Also at home here: Ponds, rivers and shores

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