Tom Pohrt 

Tom Pohrt is the author-illustrator of Having a Wonderful Time (Farrar, Straus & Giroux), winner of a Parents’ Choice Silver Honor, and the illustrator of Crow and Weasel, written by Bary Lopez (North Point Press).

More books by Tom Pohrt:

An Old Shell: Poems of the Galapagos written by Tony Johnston (Farrar, Straus & Giroux)
Trickster and the Fainting Birds written by Howard Norman (Harcourt)
The Tomb of the Boy King: A True Story in Verse written by John Frank (Farrar, Straus & Giroux)
The Walls of Cartagena written by Julia Durango (Simon & Schuster)
The Wishing Bone and Other Poems written by Stephen Mitchell (Candlewick Press)

http://biography.jrank.org/pages/724/Pohrt-Tom-1953.html.