Large marble

It flies fast, about 5 metres every second, and often goes 100 metres without a rest.

Males patrol about 1 metre above the ground looking for females. They even fly up to white pieces of paper by mistake.

A grown-up butterfly lives only about 7 to 9 days.

Its caterpillar is green-grey with black dots and yellow and white stripes, and grows to about 2 centimetres.

One rare kind, the island marble, was once thought to be gone forever, but it was found again on San Juan Island.