Bevendre

At the head of the hive is the Queen, for obvious reasons.
A Queen will generally choose either one or several converted drones to serve as a sort of cabinet and manage hive affairs when they build up.
Beneath these few are the converted drones as a whole, each bringing something unique to the hive.  
The natural born drones are those whose eggs are carried by converted drones.  These often bear a physical resemblance to their parents, having average horns and wings, though their coloration is generally muted or akin to those that attacked Canterlot.
Warriors are below the drones and make up the bulk of a hive’s defenses.  Born directly from the Queen, they are generally less intelligent than their drone counterparts, but taller and stronger, as well as bearing thicker hide, and added chitinous plating along the head, back and shoulders.  Goliaths stand as paragons among Warriors, renowned for their massive size and strength, despite their lesser intelligence.
On the bottom of the general social hierarchy are the Workers.  Like the Warriors, Workers are born directly from the Queen, but in much larger numbers and without wings.  Possessing of clever minds and swift hooves, Workers remain almost solely within the hive, tending to the tunnels and rooms within.  Though they are often very intelligent, they are also very dependent on the other changelings for sustenance and blindly loyal to their mother and Queen.