Devastation

The sinuous patterns swirling across …'s surface are gone and so, as if through magic, is the lush vegetation that formerly covered the planet. Not a single leaf, straw or flower remains. But our scientists think they may have pieced together the puzzle. The ample presence of droppings and carcasses of arthropoids have led them to believe that the planet briefly played host to a swarm of ravenous spaceborne insects that passes from world to world stripping entire planets of food.

The command below will trigger the "Devastation" event in Stellaris:

When this event fires, you can choose between these 2 options:

• Let us hope the swarm never finds our worlds.
• Gather the corpses.

Stellaris events fire in chains — one event leads to the next. Here is how Devastation (distar.1095) connects.