(Holiday House, 2001)
A non-fiction picture book about bird, bat, and insect wings.
Illustrated by Anna Wertheim.

(Holt, 2000)
A chapter book with photographs about the work that dogs do.

(Holt, 1998)
And whales whistle and giraffes lick and chimps hug and zebras chew.
Illustrated by Normand Chartier.

(Holt, 1997)
Animal rear ends and their many uses – from cats marking their territory to sea cucumbers housing pearl fish to spiders spinning silk.
Illustrated by Patrick O’Brien.

(Holt, 1995)
Animals that are easily confused with each other or with the wrong family. Taxonomy for kids.
Illustrated by Patrick O’Brien.

(Doubleday, 1991)
Exotic birds, including eighteen diverse environments and their avian inhabitants.
Illustrated by James Needham.

(Prentice-Hall, 1981)
Everything you ever wanted to know about the allium family.
Illustrations by Marian Parry.