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Sticker of Two-tailed swallowtail
Bug card No. 1391 of 1,500

Two-tailed swallowtail

Papilio multicaudata
Eats: Nectar and pollenButterfliesPonds, rivers and shores6 legs

The two-tailed swallowtail is a huge yellow butterfly with black tiger stripes. Most butterflies of its kind have one tail on each back wing, but this one usually has two. It is the biggest swallowtail in western North America.

Lives in
Western North America, from southern Canada through the western United States and Mexico to Guatemala, near streams and in moist valleys
Wingspan
7.6 to 16 cm (3 to 6.5 in)
Top speed
about 25 km/h (16 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
The butterflies sip nectar from flowers. The caterpillars eat the leaves of trees like chokecherry, ash and hoptree.
For real!Photo of Two-tailed swallowtail
Picture by ALAN SCHMIERER. CC0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Two-tailed swallowtail wings about 16 cm tip to tip (6.5 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 15 seconds

How big is Two-tailed swallowtail compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Little orange eyespots near its tails trick hungry birds into attacking its back end instead of its head, so it can escape.

2

The caterpillar folds a leaf and ties it shut with silk, then eats from inside its little leaf house.

3

Boys like to gather at muddy puddles to sip water and minerals.

4

It is the state butterfly of Arizona.

5

It spends the winter as a pupa and comes out as a butterfly in May.

you asked

Most asked questions about Two-tailed swallowtail

?How big is the two-tailed swallowtail?

Its wings measure about 7.5 to 16.5 centimetres from tip to tip, bigger than a grown-up's hand.

?Why does it have two tails?

Each back wing usually has two pointy tails. Together with its eyespots, they may fool birds into grabbing the wrong end.

?Where can you see a two-tailed swallowtail?

In western North America, near streams, in moist valleys and canyons, and in some towns.

For bug experts

Scientific name
Papilio multicaudata
Named by
Kirby, 1884
Group
Butterflies
Family
Papilionidae
Classification
Insecta > Lepidoptera > Papilionidae
Lives on
North America

Where the facts come from

  1. Papilio multicaudata (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 ALAN SCHMIERER. CC0, 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 [email protected] and we will fix it.

More from the same group: Butterflies

Also at home here: Ponds, rivers and shores