In 2013, this theory was supported by Norbert Juergens. Juergens found evidence that the sand termite, "Psammotermes allocerus", generates a local ecosystem that profits from and promotes the creation of the fairy circle. The sand termite was found in 80-100% of the circles, in 100% of newly formed circles, and was the only insect to live across the range of the phenomenon. Sand termites create the fairy circle by consuming vegetation and burrowing in the soil to create the ring. The barren circle allows water to percolate down through sandy soil and accumulate underground, allowing the soil to remain moist even under the driest conditions. Grass growth around the circle is promoted by the accumulated soil water, and in turn the termites feed on the grasses, slowly increasing the diameter of the circle. This behavior on the part of "Psammotermes allocerus" amounts to creation of a local ecosystem in a manner analogous to behaviour of the common beaver.