Toad Boglar Scavengers are a rarer type of Gnoblar that lives in the Marshes of Madness. Approx Co-ordinates are (22500:500, 27000:4000, and 26000:6000). So far I have only found 3 with a fairly fast respawn rate. Unfortuantely, they are the object of a kill quest in Dwarf Chapter 6 by the NPC Estelle Meyer for the kill quest Boglar Vengence. When they are attacked, they explode and two smaller Boglar scavengers pop out and begin to attack the agressor. There is no tome unlock for maxing out this kill collector.