Snakes versus dragons: how we filmed this sequence for Planet Earth II

Cameraman Richard Wollocombe reveals what it took to capture the stand-out sequence of Galapagos racer snakes hunting baby marine iguanas en masse

We filmed this sequence over a period of two years, in two trips to Galapagos of about 18 filming days each, adding up to around 400 hours of field time. The edited material from Galapagos lasts less than nine minutes. It contains the first ever footage of snakes hunting dragon-like marine iguanas en masse, one of the most thrilling examples of animal behaviour I have had the privilege to film.