Alderney late 300s, at above the island's only natural harbour. The etymology of the island's name is obscure. It is known in Latin as "Riduna" but as with the names of all the Channel Islands in the Roman period there is a degree of confusion. "Riduna" may be the original name of Tatihou, while Alderney is conjectured to be identified with "Sarnia". "Alderney"/"Aurigny" is variously supposed to be a Germanic or Celtic name. It may be a corruption of "Adreni" or "Alrene", which is probably derived from an Old Norse word meaning "island near the coast". Alternatively it may derive from
French Island (Victoria) Significant species on the island include: king quail, the critically endangered orange-bellied parrot, fairy tern, white-bellied sea eagle, swamp skink, long-nosed potoroo. The island is one of only two places in Victoria where the invasive red fox is not present, which has enabled the island to maintain a variety of indigenous species which have been devastated by the predator elsewhere including Phillip Island. However rabbits, feral cats, feral goats, feral pigs, Indian mynahs and starlings pose a threat to the island's biodiversity. There is one free camping site in the National Park at Fairhaven, 4 km up the coast road