The Xerces Society for Invertebrate Conservation says, along the California coast, 4.5 million monarchs overwintered in the ...

Scientists have recently mapped the painted lady butterfly's annual flight from equatorial Africa to northern Europe and back, the world's longest butterfly migration. In Constant Bloom, photographer ...

Using a technique called ancestral state reconstruction, which maps the likeliest ranges of butterfly species and caterpillar host plants back in time through the family tree, researchers ...