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Sticker of Elm sphinx
Bug card No. 1539 of 4,939

Elm sphinx

Ceratomia amyntor
Eats: PlantsMothsForests and woods6 legs

The elm sphinx is a big grey-brown hawk moth with wavy patterns on its wings and a tiny white dot on each front wing. Its caterpillar is the real star: it has four long horns on its front and one more horn on its tail.

Lives in
Eastern and central North America, from Nova Scotia and Alberta to Florida and Texas
Wingspan
8.2 to 12 cm (3.2 to 4.5 in)
Top speed
about 54 km/h (34 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
Its caterpillars eat the leaves of elm, birch, basswood and cherry trees.
For real!Photo of Elm sphinx
Picture by Andy Reago & Chrissy McClarren. CC BY 2.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Elm sphinx wings about 12 cm tip to tip (4.5 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 your handcould fly across a whole football pitch in 7 seconds

How big is Elm sphinx compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its caterpillar can be green or a dark mix of brown, orange and pink.

2

When it is ready, the caterpillar crawls down the tree and digs into the soil to become a pupa.

3

It can spend the whole winter underground as a pupa.

4

Its tiny eggs are see-through and lime green.

you asked

Most asked questions about Elm sphinx

?Why is it called the four-horned sphinx?

Its caterpillar has four long horns on its front, plus a horn on its tail.

?What does the elm sphinx caterpillar eat?

Elm leaves, and also birch, basswood and cherry leaves.

For bug experts

Scientific name
Ceratomia amyntor
Named by
Geyer, 1835
Group
Moths
Family
Sphingidae
Classification
Insecta > Lepidoptera > Sphingidae
Lives on
North America
Also known as
Four-horned sphinx

Where the facts come from

  1. Ceratomia amyntor (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 Andy Reago & Chrissy McClarren. 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: Moths

Also at home here: Forests and woods

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