Bleeder is the strongest scythid on Pandora. He is found in the Trash Coast. He is the only one of his species capable of sustained flight, and, true to his name, bleeds constantly. Bleeder must be killed in the "House Hunting" mission. May also drop a Nailer if he is killed again after the mission is turned in.
It is best to deal with the lesser scythids first and then focus on Bleeder himself. He does not deal much damage but has a rather large amount of health and is constantly moving which makes him difficult to kill. Go on top of the pipeline that the Claptrap repair kit is retrieved from. If done properly, Bleeder will not surface until the player is on top of the pipeline, and will not move around at all, allowing for an easy kill. Scythids are usually weak against melee attacks as well. This makes the use of melee attacks a viable, albeit more dangerous, tactic to quickly defeating Bleeder.
Bleeder is found in the lower portion of the Trash Coast map. From the transition point, down the eastern side until the house from House Hunting is seen. Under the overhead pipeline in a pile of trash.