Shouting above the noise in the cockpit, we asked Charles if it didn’t worry the rhino having us flying so close to them. “Not half as much as it worries you,” he said. “No, it doesn’t bother them at all really. A rhino isn’t scared of anything very much and is only really interested in what things smell like. We fly down low over them pretty regularly to get a good look at them, identify them, see what they’re up to, check that they’re healthy, and so on. We know them all pretty well, and we’d know if they were upset about anything.”