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Sticker of Cassius blue
Bug card No. 0818 of 4,939

Cassius blue

Leptotes cassius
Eats: Nectar and pollenButterfliesGardens and meadows6 legs

The Cassius blue is a small butterfly with pale blue wings. Underneath, its wings have stripes, which is why it is also called the tropical striped blue. It flutters around warm places in the Americas.

Lives in
Florida and Texas south through the Caribbean, Mexico and Central America to South America
Wingspan
2 to 3.5 cm (0.79 to 1.4 in)
Top speed
about 11 km/h (6.8 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It is a gentle little butterfly.
What does it eat?
The butterfly sips nectar from flowers. Its caterpillars eat bean family plants, like lima beans and rattlepods, and can also live on plumbago bushes.
For real!Photo of Cassius blue
Picture by Charles J. Sharp. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Cassius blue wings about 3.5 cm tip to tip (1.4 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 6 grains of rice in a rowcould fly across a whole football pitch in 34 seconds

How big is Cassius blue compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

A girl in a famous novel, Blue van Meer, was named after this butterfly.

2

Its caterpillars can grow up on plumbago, a plant that is not related to the bean plants they usually eat.

3

Sometimes single butterflies fly far north, as far as Virginia and Kansas.

you asked

Most asked questions about Cassius blue

?What does the Cassius blue caterpillar eat?

Mostly bean family plants, like lima beans, and also plumbago.

?How big is the Cassius blue?

Its wings measure about 2 to 3.5 centimetres from tip to tip.

For bug experts

Scientific name
Leptotes cassius
Group
Butterflies
Family
Lycaenidae
Classification
Insecta > Lepidoptera > Lycaenidae
Lives on
North America, South America
Also known as
Tropical striped blue

Where the facts come from

  1. Leptotes cassius (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 Charles J. Sharp. CC BY-SA 4.0, 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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