Mark spends more than half a year travelling the world in search of wildlife and exploring wild places, so he is continually adding to his image collection. Use the new searchable database above to see what is currently available on line.
Take a browse, too, through Mark's recent photos to get an idea of what he has been up to lately – click on 'Pictures of the Month' at the top of the image. For advice, meanwhile, on many fields of photography as written by Mark and published in BBC Wildlife magazine, click on 'BBC Wildlife Photo Masterclass'.
Mark has been Chairman of the judging panel of the prestigious Wildlife Photographer of the Year Competition for the past four years.
He will soon begin working, too, on Wild Wonders of Europe, a massive photographic project involving Europe's 50 top wildlife photographers. Underwater images of narwhals in Greenland, sperm whales in the Azores and bottlenose dolphins in Croatia will be Mark's contributions, starting this summer.