In this short, "Keepers of the Light" presented by Jungles in Paris, we meet Doug Laugher who has a rare and solitary occupation – he is a the principle lighthouse keeper on Machias Seal Island, New Brunswick, Canada.

Machias Seal Island lies in a "gray zone" of the Atlantic Ocean, a disputed area of territory between Canada and Maine. Longitude: about 44 degrees North. Latitude: about 67 degrees West. Weather: often foggy (it's a gray zone in that respect, too). Human population: One. The lighthouse keeper's job in a lonely one.

There are, in fact, two Canadians keepers here. They swap out every 28 days, arriving and leaving by helicopter. In summer, they are joined by small groups of scientists and day-tripping birdwatchers, who arrive by boat. The scientists are there to study seabirds: their mating behavior, their flying habits, what kinds of fish they eat. Bird population: about 10,000.