Every autumn, millions, perhaps a billion, butterflies from wide areas of North America return to the site and cluster on small areas of the forest reserve, colouring its trees orange and literally ...

Butterflies are distinguished from moths in being active during the day, having clubbed antennae and lacking a frenulum. Of the 700 species of butterflies that occur in North America, 74 occur in the ...

The monarch butterfly is widely recognized and widely dispersed across North America and it's in trouble. Federal officials ...