The music of the spheres.

Grasshopper warbler....

"Since the sound made in crop circles also has the ability to transmit on radio frequencies and interfere with electronic equipment, birds and insects can be ruled out; and although skeptics are quick to accuse researchers that the recorded sound is, in fact, the grasshopper warbler, stroboscopic analysis of both voice prints revealed vast differences between this bird and the bizarre noise. Besides, these birds frequent marshes, not vast, open fields of cereal crop.

Interestingly, the Aborigines relate to this trilling sound. During their ceremonies to contact — in their words — the Sky Spirits, a "bora," consisting of a specially-shaped piece of wood, is attached to the end of a long string and whirled, creating a noise practically identical to the crop circle hum."
[link to www.spiritofmaat.com]

Lotus