Many children's books focus on butterflies, but the ones here, I have included because of their illustrations and/or stories rather than their factual information. They will certainly cover a wide range of uses.
1. Butterfly by Petr Horacek.
2. A Butterfly is Patient by Dianna Hutts Acton and Sylvia Long.
3. Caterpillar Butterfly by Vivian French and Charlotte Voake.
4. Caterpillar and Butterfly by Ambelin Kwaymullina.
5. Ten Little Caterpillars by Bill Martin Jnr and Lois Ehlert.
6. I Wish I Were a Butterfly by James Howe and Ed Young.
7. Velma Gratch and the Way Cool Butterfly by Alan Madison and Kevin Hawkes.
8. Summer Birds: The Butterflies of Maria Merian by Margarita Engle and Julie Paschkis
For more butterfly titles including expository texts see Pinterest here.