Jeff Wilson Jeff is the series producer and director of Parenthood. He has been a film-maker for more than 25 years, previously working on Planet Earth and Frozen Planet.

George Bumann George lives near Yellowstone National Park and is a sculptor, animal language expert and the author of Eavesdropping on Animals (Greystone Books). Find out more about wolf howls at ...

Ryan Wagner Ryan Wagner is a wildlife biologist, photographer and science journalist. He is currently pursuing a PhD at Washington State University.

Sarah is a travel writer, broadcaster and the author of various Bradt Guides. She is currently working on a documentary about the Andean condor. sarahwoods.co.uk. Recent articles by Sarah Woods ...