The D&D Cripple series of flies have been hot flies for us and our customers. The D&D Cripple Callibaetis keeps that trend going strong. Fish the D&D Cripple Callibaetis in late spring and summer on lakes or slow moving rivers that experience Callibaetis mayfly hatches. The mottled, dark gray coloration of the D&D Cripple Callibaetis matches many Callibaetis hatches spot on.