Birds in Flight

The Art and Science of How Birds Fly

2008

Birds of Costa Rica

A Field Guide

2010

Butterflies, Moths, and Other Invertebrates of Costa Rica

A Field Guide

2010

Field Guide to the Wildlife of Costa Rica

2002

Mammals, Amphibians, and Reptiles of Costa Rica

A Field Guide

2010

Oology and Ralph's Talking Eggs

Bird Conservation Comes Out of Its Shell

2007

Woodworking for Wildlife

Homes for Birds and Animals

2010