Another addition to our barbless nymphs. The Newbury's PMD is a fly fishing pattern designed to imitate the Pale Morning Dun mayfly. The PMD hatch is widespread on many trout streams throughout the United States and a favorite among anglers. John Newbury's Alt Rocker perdigons get the job done. This impressionistic mottled perdigon is a wonder when PMD nymphs are crawling around on rocks getting ready to emerge.