The 400ft pattern, the latest in a string of bird-themed designs seen this summer, appeared overnight in a field in Woodborough Hill.
But while crop circle specialists are searching for a meaning, and some are convinced it is a tribute to the teenage wizard.
Steve Killick, a Harry Potter fan, said: "It is very exciting to think that there are fans of Harry from other galaxies.
"Most of the world has fallen in love with Harry Potter so it makes sense that most of the universe will do eventually too."
JK Rowling's seven-book series on the adventures of wizard-in-training Harry have sold over 400 million copies since the first title was released in 1997.
Pattern expert Karen Alexander dismissed the claims.
She said: "The owl is an ancient symbol of wisdom, so perhaps it is a message to people that we should be thinking deeper about the world around us.
Bruce- Is this Moloch, the god that is worshipped by the elites, like at Bohemian Grove? http://www.jesus-is-savior.com/False%20Religions/Wicca%20&%20Witchcraft/bohemian_grove_exposed.htm
Pictures of Bohemian Grove:
Alex Jones Bohemian Grove Snip:
