Rabbit Leech Black - Leech. This Black Rabbit Leech is simply a superb fly. It is fantastic fly in lakes and slower stretches of your favourite rivers. This fly can be fished with great results in the early evening as the dark colour creates a silhouette that is sure to catch fish and if that is not enough, the red and blue flash added is sure to catch the eyes of all the fish in the area. The rabbit fur makes this fly a formidable tool as it creates such a lifelike movement that it just draws in the trophy winning trout.