Found a nice mention-
A Monarch Butterfly’s Journey by Suzanne Buckingham Slade and illustrated by Susan Swan.
The illustrations are bright mixed-media collages by Susan Swan. I am not a huge fan of collage art in children’s books that tries for ultra-realism, but Swan’s butterflies are an example of how it should be done. They are fascinating and fun, with a high level of energy. I love the humorous side comments of the insects which make comments in their own cartoon bubbles. One butterfly asks, “Are we there yet?”
From: Growing With Science Blog at Peeeple.com