Nessie and Noctilucent Clouds

Since the 1930s there have been over a thousand recorded sightings of monsters in Loch Ness, Scotland. The consensus of experts is these reports of mysterious creatures (known in Scottish Highlands folklore as Nessie) have mundane or prosaic explanations such as hoaxes, wakes, mirages, misidentifications of floating objects (e.g., natural debris, boats) and known native fauna (e.g., deer, otters, diving birds), opposed to extraordinary or unusual explanations such as exotic fauna, escaped animals from traveling circuses, relict plesiosaurs and unknown or elusive species (e.g., ‘long-necked’ pinniped, giant eel). After providing an overview of the different hypotheses and a history of the search for the Loch Ness Monster – the author of this paper argues a rare meteorological phenomenon might explain some monster sightings in the loch during twilight hours between May and August – reflections of noctilucent clouds (NLCs).