You know, these things:
Though that is an unusually elaborate creation, made 409 individual circles. I use "creation" advisedly, as it is generally agreed all or almost all are man-made -- and it is especially agreed by the makers, who may also (in addition to those who study them) be called cereologists. Coined from Ceres, the Roman goddess of agriculture, who also gave us cereal -- as in the crops the circles are made in.
He works in Accounting, but he also moonlights in cereology.