(Figured I’d do a proper write-up on these guys)
 
The Miasma Hive is probably the second largest of the known hives. It usually resides underneath or at the edges of big cities like Las Pegasus or Manehattan, modifying sewage systems and/or garbage dumps to their needs. They eat rotten food and the occasional carcass to produce their body liquids, which, in addition to their choice of living space, gives the whole hive a particularly rancid smell. Sometimes it even gets so bad that it’s noticeable when a changeling has transformed himself into another creature.
 
Their Queen, Miasma herself, is a very vain and snobby person and tries to appear better than she is. She has two changelings follow her around with incense burners wherever she goes and douses herself in perfume as often as possible. One wonders what is worse, the rotten smell of the hive, or the overwhelming stench of sweet perfume contrasting with it.  
Although trying to appear noble and sophisticated, the queen has a very bad temper and can turn from sweet to sour in mere seconds.*
 
(She also has very bad table manners (and taste), and won’t even stop short of literally rolling around in her food. It’s not helped by the fact that she has holes in her cheeks so you can see her chewing even if she has her mouth closed)  
The hive’s manner of gathering victims isn’t very sophisticated, ranging from cries of help from out of a gully to simply waiting for someone to get stuck in their secretions while drunkenly wandering about at night.
 
*Think Prof. Ratigan from “The Great Mouse Detective”.