There is no real evidence for the Loch Ness Monster

[nycbos]

1. The Lock Ness Monster is real in the Harry Potter world.

http://harrypotter.wikia.com/wiki/Scotland


"Scotland is one of the most frequent breakers of Clause 73 (this is the clause that ensures the secrecy of magical creatures) of the International Statute of Wizarding Secrecy of any nation. This is mostly due to the world's largest kelpie residing in Loch Ness."


http://harrypotter.wikia.com/wiki/Loch_Ness_Monster

The Loch Ness Monster, as it is popularly known, is the world's largest Kelpie. Its favourite shape is that of a Sea serpent. Wizard observers from the International Confederation of Wizards discovered it was a Kelpie when they observed it changing into an otter on the approach of a team of Muggle investigators, then back into a Sea Serpent. The Office of Misinformation has worked diligently, convincing the Muggles that all photographic evidence of "Nessie" is actually fake.