Derek Klingenberg, 35, from Peabody, Kansas, merely puts the brass instrument to his lips and blasts out some upbeat tunes - a favorite being Royals by Lorde - before the cows come flocking.
In a bid to prove the bizarre phenomena, Mr Klingenberg recently filmed himself in action.
Indeed, at the beginning of his video he is seen sat in an empty field but as he continues to play cows crop up on the horizon.
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