Hive bosses on Quirefang -1 spawn quite often. Sometimes I kill Chopper on the first round, then 10 minutes later another Chopper appears. The most common bosses are Shadowstalker and Chopper, but it depends on your luck.
Mechanics of insect bosses from Hive Outpost is completely different (it's still unknown) and it's problably impossible to loot shining dung balls from them.
During the hunt on Hive Outpost you can find one of the monsters below:
1) Hive Overseer
2) Spidris Elite
3) The Manhunter (very rare)
4) The Mean Masher (very rare)
5) The Hungerer (very rare)