Carwardine has written more than 50 books. Most recently he has written Mark Carwardine's Ultimate Wildlife Experiences (Wanderlust Publications, 2011), which was
a travellers' guide to the natural world. In 2009, he wrote Last Chance to See: In the Footsteps of Douglas Adams
(HarperCollins). This is a sequel to the best-selling book, Last Chance to See
, which he wrote with the late Douglas Adams (author of The Hitchhiker’s Guide to the Galaxy
). Other books that Carwardine has written include the award-winning Shark Watcher’s Handbook
and Eyewitness Handbooks: Whales, Dolphins and Porpoises
, which is the best-selling cetacean field guide ever published (nearly a million copies in print). Carwardine also writes a monthly column in BBC Wildlife
magazine, and has written hundreds of articles for newspapers and magazines.
In 1989 the BBC Radio 4 series Last Chance to See and the subsequent book (1990) described eight expeditions by Carwardine and writer Douglas Adams to find and report on some of the most endangered species around the world. These were the aye-aye in Madagascar, the Komodo dragon in Indonesia, the kakapo in New Zealand, the Amazonian manatee in Brazil, the Yangtze river dolphin in China, the Juan Fernández fur seal in Chile, the northern white rhino in the Democratic Republic of the Congo, and the Rodrigues fruit bat in Mauritius.
Carwardine also presented the weekly half-hour radio programme Nature, on BBC Radio 4, for many years. He has also been the presenter of many other programmes for BBC Radio 4.
In autumn 2009, he joined forces with Stephen Fry to present a follow-up to the original Last Chance to See with the late Douglas Adams. This was the six-part BBC2 television series, also called Last Chance to See which concerned the very same endangered species as in the original and how they have fared twenty years on. The series not only updated the situation with most of the endangered species featured in the original series but looked at some new ones, including the blue whale in Baja California, Mexico.
In spring 2010, he co-presented The Museum of Life (BBC2, 6 episodes), which explored the pioneering and often surprising research work and wildlife collections of the Natural History Museum, in London.
On BBC2 in October 2010 there was an additional Last Chance to See special by Carwardine and Fry about the northern white rhino, Last Chance to See: Return of the Rhino, which followed the re-introduction of zoo-raised rhinos into the wild.
Also on BBC2 on 7 November 2010 Carwardine and Fry co-presented Stephen Fry and the Great American Oil Spill about the effects, four months after the BP oil disaster in the Gulf of Mexico.
Carwardine has an extensive collection of wildlife, nature and environment photographs taken on all seven continents and in more than a hundred countries. He was also Chairman of the judging panel for the prestigious Wildlife Photographer of the Year competition for seven years since 2005, run by the Natural History Museum and BBC Wildlife.
Carwardine was a founding director of the wildlife travel companies Discover the World, WildOceans and Ocean Wanderers. He now runs whale-watching tours to Baja California, Mexico, three times a year, charters ships to the Arctic and Antarctic, and occasionally leads specialist wildlife photography trips.
In 2009, Carwardine and television presenter Stephen Fry visited Codfish Island in New Zealand as part of a series for the Last Chance to See, focusing on endangered species around the world. While they were filming a rare kakapo bird called Sirocco, the bird hopped onto Carwardine's head and attempted to mate with him. The scene itself and Fry's commentary, "Sorry, but this is one of the funniest things I've ever seen. You are being shagged by a rare parrot", proved an instant television hit, being featured on news items around the world.
A video of the incident was uploaded to YouTube, where it received more than 700,000 views in the first week. As of July 2017 it has been viewed more than 7.3 million times.