Des-Extinción
Nature Symphony
2019
Blackfish
2013
Birds from the Gods
2004
The Incredible Journey of the Monarch Butterfly
2012
The National Parks Project
2011
Dinosaurs, Dinosaurs, Dinosaurs
1985
Snow Bears
2017
The Great Polar Bear Adventure
2006
Pride Ruler at Risk
2016
Writing: Plain & Fancy
1981
America's Lost Valley: Craters of the Moon National Monument
1989
Knockhatch Animal Conservation: A Short Documentary
—
Climate Change: The Facts
2019
The Lost City
2016
World Beneath the Sea
1976
Muir Woods
2013
Bears In Our National Parks
2008
The Glacier Fox
1978
Cambio de sentido
2009
Wings 3D
2014