Monarch Butterfly - Journey North - This site tracked the migration of the monarch butterflies in the Spring of 1998.  Included are maps and information on this fascinating trait of the monarch butterfly.

Monarch Watch - Filled with information on monarch butterflies.

The Butterfly Website - Great photos and information.  A World Atlas section identifies butterflies and moths specific to certain parts of the world, it is even broken down by states.

Butterflies.Com - Good background information and photographs. 

Encarta Encyclopedia - The entry for Butterflies and Moths.

Enchanted Learning - Crafts, activities and information.

Born to be a Butterfly by Karen Wallace.
Terrific photographs and simple text give facts about the butterfly.

The Butterfly Alphabet Book by Brian Cassie and Ferry Pallotta.
Every letter of the alphabet provides information on a different aspect or type of butterfly.

The Butterfly House by Eve Bunting.
This popular author pens a lovely story about a young girl and her grandfather rescuing a caterpillar and watching it change to a butterfly.

Butterfly: See How They Grow by Mary Ling.
Wonderful photographs accompany the informational, yet simple text, of this book.

Butterfly Story by Anca Hariton.
A simple story on the five week process of caterpillar to butterfly.

Caterpillar Caterpillar by Vivian French.
A little girl gets a lesson in the birth of butterflies from her grandfather's garden.

Charlie the Caterpillar by Dom Deluise.
No one wants to befriend an ugly caterpillar.  However, things change when he becomes a beautiful butterfly.  A story about true friendship.

From Caterpillar to Butterfly (Let's Read and Find Out Science) by Deborah Heiligman.
A classroom of children watch the metamorphosis of a butterfly and then set it free.

I Wonder What it's Like to Be a Butterfly by Erin M. Hovanec.
Good information on butterflies from how they find food to where they live. 

The Journey of a Butterfly by Carolyn Scrace.
This book follows the migration of the monarch butterfly in an easy to read format.

The Magic School Bus : Butterfly and the Bog Beast : A Book About Butterfly Camouflage (Magic School Bus) by Nancy E. Krulik.
Ms. Frizzle and her class take one of their classic field trips to discover more about the butterfly.

Malinda Martha Meets Mariposa: A Star is Born by Marcia Trimble.
A young girl acts out the metamorphosis of a butterfly.

Monarch Butterfly by Gail Gibbons.
This fabulous author shares great information and illustrations on the monarch butterfly.

The Very Hungry Caterpillar by Eric Carle.
This classic book tells the story of a little caterpillar eating his way through the week before wrapping himself in a cocoon and turning into a beautiful butterfly.

Waiting for Wings by Lois Ehlert.
This simple rhyming book is highlighted by amazing art work.