Hello there !
Wanted to ask about these annoying silicoid bee-like queens as I got attacked in three colonies by them ..I lost a minor one but managed to defeat their "drones" on two others.The battle ended but I still have the "queen" icon on my planets but I don't have any battles happening.Should I leave my fleets from these systems or the queens will find a chance to attack again?
Thank you

Hello,
The queen will go into hibernation if the battle is a draw at your world. After a few turns, (2 to 10?) a new battle will happen.

yep root out the hive, its inside an asteroid, and kill the queen, if it retreats it will infest another system and start this process over.

To add: Any system with an asteroid belt is a target for the silicoids.