To have a huge, friendly whale willingly approach your boat and look you straight in the eye is without doubt one of the most extraordinary experiences on the planet.

There is something about dolphins. It is difficult to put into words.

To have a huge, friendly whale willingly approach your boat and look you straight in the eye is without doubt one of the most extraordinary experiences on the planet.

The Galapagos Islands are probably the most famous wildlife-watching destination in the world. And no wonder - it's almost impossible to exaggerate the sheer spectacle of the place that provided inspiration for Charles Darwin's ground-breaking theory of natural selection.

The scary thing is that in my lifetime, 95 per cent of the world's rhinos have been killed.

China is responsible for a lot of the major conservation issues we're facing. It's the main market for rhino horn. Tigers are being killed for tiger bone wine. They're driving the tropical timber trade and illegal logging in Indonesia, and the trade in tropical reef fish.

Nothing speaks louder than an evocative photograph that stirs the imagination, tugs at the heart strings and engages the mind.