Butterflies evolved from moths about 100 million years ago in North America : NPR

Butterflies likely split from nocturnal moths around 100 million years ago in present-day western North America or Central America, a new study of the winged insects finds.

Feet, antennae, wings—it's all a matter of taste for insects, NIU researchers say

Friends Of Monarchs, Utah

Flying with dinosaurs: the evolution of moths and butterflies – Douglas Boyes: Blog

Monarch Butterfly Archives - Wild About Utah

All butterflies evolved from ancient moths in North America 100 million years ago

Lepidoptera migration - Wikipedia

Which came first: the butterfly or the flower?, Evolution

What does a caterpillar grow up and change into? - Quora

Monarch Butterfly Archives - Wild About Utah

Ohio Birds and Biodiversity: June 2015

Scientists Discover Butterflies Originated in America 100 Million Years Ago When Upstart Moths Wanted to Bask in the Sun

Butterflies evolved from moths about 100 million years ago in North America : NPR

The U.S. Geological Survey wants you to send in dead butterflies for research : NPR