Wapsi Peacock Herl Strung are eyed tail feathers used for the bodies of many traditional flies like Coachman, Royal Coachman, Black & Peacock Spider, etc. Wapsi Peacock Herl Strung is an all-purpose material and ties flies of all types. Twist several strands together to make a rope or strip a single strand to make segmented bodies on midges, nymphs, and dry flies.