Charles Foley and Jon Hall talk to mammalwatchers, biologists, conservationists and those with a passion for observing and protecting the world's wild mammals. For more information visit www.mammalwatching.com/podcast.

Dr Charles Foley is a mammalwatcher and biologist who, together with his wife Lara, spent 30 years studying elephants in Tanzania. They now run the Tanzania Conservation Research Program at the Lincoln Park Zoo in Chicago.

Jon Hall set up mammalwatching.com in 2005. Genetically Welsh, spiritually Australian, currently in New York City. He has looked for mammals in over 100 countries.

Produced and edited by José G. Martínez-Fonseca, mammalwatcher, photographer and wildlife biologist.