- Bears, created and written by John Bonnett Wexo
- Alligators & crocodiles, created and written by John Bonnett Wexo ; scientific consultants, James P. Bacon, Jr., John L. Behler
- Penguins, created and written by John Bonnett Wexo ; scientific consultants, George Gaylord Simpson, Bernard Stonehouse, Frank S. Todd
- Seals & sea lions, created and written by John Bonnett Wexo
- Snakes, created and written by John Bonnett Wexo ; scientific consultant, Richard Etheridge
- Giraffes, created and written by John Bonnett Wexo ; scientific consultants, Anne Innis Dagg, J. Bristol Foster, John Harris
- Wild horses, created and written by John Bonnett Wexo ; zoological consultant, Charles R. Schroeder ; scientific consultants, James Dolan, Oliver A. Ryder, David P. Willoughby
- Elephants, created and written by John Bonnett Wexo ; scientific consultants, Charles A. McLaughlin, Mark S. Rich
- Orangutans, created by John Bonnett Wexo ; written by Marjorie Betts Shaw, John Bonnett Wexo ; scientific consultants, Charles A. McLaughlin, Mark Rich
- Sharks, created and written by John Bonnett Wexo
- Wolves, created and written by John Bonnett Wexo ; scientific consultant, R. Marlin Perkins
- Parrots, created and written by John Bonnett Wexo ; zoological consultant, Charles R. Schroeder ; scientific consultants, James Dolan, Kenton C. Lint
- Ducks, geese & swans, created and written by John Bonnett Wexo
- Whales, created and written by John Bonnett Wexo ; scientific consultants, Vladimir S. Gurevich ... [and others]
- Little cats, created and written by John Bonnett Wexo
- Rhinos, created and written by John Bonnett Wexo
- Gorillas, written by John Bonnett Wexo