Meanwhile, to film the then-legendary Life of Birds documentary series back in 1998, he travelled a mammoth 256,000 miles across 42 countries for those shows alone.
He believes his huge tally of flights was justified at the time, but he has now massively scaled down, while there is the added concern of elevated global warming.
David warned: “I don’t think people should fly just for the hell of it [and] the BBC would be absurd to spend money on flights that are not essential or important.”
To watch David’s full interview with Winterwatch tune into the show on BBC Two and iPlayer at 8pm on January 26 and 27.
Meanwhile, Wild Isles airs on BBC One and iPlayer this spring.