What does it mean to see a black butterfly outdoors?

It means warm weather. Butterfly is an insect that can often be seen in warm periods. Seeing a black butterfly outdoors represents the warmth of the weather. Butterfly, commonly known as "Butterfly, Arthropod, Insecta, Lepidoptera, Hammerhead". There are about 18500 species in the world, most of which are distributed in America, especially in Amazon basin.