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Sticker of One-eyed sphinx
Bug card No. 3114 of 4,939

One-eyed sphinx

Smerinthus cerisyi
Eats: Nothing as a grown-upMothsForests and woods6 legs

The one-eyed sphinx is a big moth with a surprise on each back wing: a blue eyespot with a black middle. When it shows its back wings, it looks like a pair of eyes staring at you. It flies at night.

Lives in
North America, from Alaska and Canada to California, in woods and near willows
Wingspan
6 to 9 cm (2.4 to 3.5 in)
Top speed
about 48 km/h (30 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
The grown-up moth does not eat at all. Its caterpillar eats leaves of willow, poplar, pear, plum and snowberry.
For real!Photo of One-eyed sphinx
Picture by Mike Boone. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How wide are its wings?

One-eyed sphinx wings about 9 cm tip to tip (3.5 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)
wings as wide as 3 toy building brickscould fly across a whole football pitch in 7.9 seconds

How big is One-eyed sphinx compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The adult moth never eats. It lives on the energy it stored as a caterpillar.

2

It was named after a French scientist called Alexandre de CΓ©risy.

3

It has only one family a year, and you can find the moths through much of the summer.

4

It is attracted to lights at night.

you asked

Most asked questions about One-eyed sphinx

?What does the one-eyed sphinx eat?

The moth does not eat at all. Its caterpillar eats willow, poplar and fruit tree leaves.

?Why is it called one-eyed?

Each back wing has one blue eyespot with a black centre.

For bug experts

Scientific name
Smerinthus cerisyi
Named by
Kirby, 1837
Group
Moths
Family
Sphingidae
Classification
Insecta > Lepidoptera > Sphingidae
Lives on
North America
Also known as
Cerisy's sphinx

Where the facts come from

  1. Smerinthus cerisyi (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 Mike Boone. CC BY-SA 2.5, 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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Also at home here: Forests and woods

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