Purple Crows

Every fall, over one million Purple Crows journey from northern to southern Taiwan. They spend the winter in warm valleys known as "Purple Butterfly Valleys." In the spring, they return north to mate and lay eggs for a new generation. But these butterflies are under threat. In the past 20 years, many of the purple butterfly valleys have disappeared because of human activities. Today, these valleys and the butterflies are protected.

Scientific Name: genus Euploea
Status: common
Range: all around the island of Taiwan
Habitat: a wide range of habitats
Appearance: iridescent blue and purple wings
Cool Fact: Purple Crow larvae (caterpillars) eat the leaves of poisonous plants. The poison is stored in the adult's body, so they taste bad to predators!

Image credits: main image, © National Museum of Natural Science Taiwan.