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Sticker of Dusky owl-butterfly
Bug card No. 1439 of 4,939

Dusky owl-butterfly

Caligo illioneus
Name means: “Caligo means darkness in Latin, maybe because it flies at dusk. Illioneus comes from Ilioneus, a friend of the hero Aeneas in an old Roman poem”
Eats: PlantsButterfliesRainforests and jungles6 legs

The dusky owl-butterfly is a giant butterfly from the rainforests of Central and South America. On top its wings shine blue or purple. Underneath they are dull brown with two huge spots that look just like the eyes of an owl.

Lives in
Costa Rica and much of South America, such as Brazil, Colombia, Ecuador and Peru, in rainforests
Wingspan
12 to 15 cm (4.7 to 5.9 in)
Top speed
about 24 km/h (15 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It is a gentle butterfly that cannot bite or sting.
What does it eat?
The grown-up butterfly mostly drinks the juice of old, fermenting fruit. The caterpillars eat banana plants.
For real!Photo of Dusky owl-butterfly
Picture by Hectonichus. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Dusky owl-butterfly wings about 15 cm tip to tip (5.9 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 16 seconds

How big is Dusky owl-butterfly compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its wings are 12 to 15 centimetres across, wider than a grown-up's hand.

2

When it closes its wings, the dull brown underside helps it hide among the leaves.

3

It likes to fly at dusk, when the light is fading.

4

Its caterpillars grow up to 12 centimetres long, almost as long as the butterfly is wide.

5

So many caterpillars can feed on banana plants that they damage large banana farms.

you asked

Most asked questions about Dusky owl-butterfly

?Why is it called an owl butterfly?

Because the big spots under its wings look like the eyes of an owl.

?How big is the dusky owl-butterfly?

Very big. Its wings are 12 to 15 centimetres across.

For bug experts

Scientific name
Caligo illioneus
Group
Butterflies
Family
Nymphalidae
Classification
Insecta > Lepidoptera > Nymphalidae
Lives on
North America, South America
Also known as
Illioneus giant owl

Where the facts come from

  1. Caligo illioneus (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 Hectonichus. CC BY-SA 3.0, 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: Butterflies

Also at home here: Rainforests and jungles

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