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This article is for the PC version of Stellaris only.

Migrating Forests is a colony event chain that has a very small chance to trigger 2 or 3 years after any colony has been founded. It can only happen once per game. The event chain offers two mutually exclusive paths which both have eventual rewards and drawbacks.

Migrating Forests


The surface of [colony name] is covered in lush forests, with massive tree analogues rising hundreds of meters into the air. Interestingly, our colonists have found that nearly all of the flora is mobile to various degrees. Forests stretching for miles will slowly migrate to new areas richer in nutrients in a cycle that seems tied to the [planet or moon]'s orbit.

Unfortunately, this has seriously hampered our efforts to develop the colony's infrastructure. The migrating trees frequently cut power lines while smashing our buildings and roads into rubble.

 
Trigger conditions:
  • Not capital world
  • Not Machine Intelligence
  • Planet is Arid, Continental, Savannah, Tropical or Tundra
Mean time to happen:

Time 30 months


We need to find a solution.
  • Adds a Migrating Forests planetary feature to the colony
  • Issue Special Project: Study Migrating Forests
  • Issue Special Project: Burn Migrating Forests

Special Project Completed


We have learned that the roaming forests on [colony name] avoid certain regions that are home to colonies of a native pseudo-insect. These insects secrete a pheromone that can be used to steer the wandering trees away from population centers.

Furthermore, the areas where the forests most frequently range have been closed off as nature reserves. Our biologists can learn much by studying this reserve from the neighboring regions.

 
Trigger conditions:
  • Migrating Forests
Is triggered only by:

Finishing the Study Migrating Forests special project


Excellent.
  • Removes the Migrating Forests planetary feature from the colony
  • Adds a Migrating Forests Reserve planetary feature to the colony

Special Project Completed


A napalm bombing campaign has been effective in decimating the migrating forests on [colony name]. The massive firestorms have left a smoldering landscape in their wake, in which our ecologists have planted more traditional and significantly less mobile off-world trees. Losses to the [planet or moon]'s wildlife have been substantial, but within acceptable limits.

 
Trigger conditions:
  • Migrating Forests
Is triggered only by:

Finishing the Burn Migrating Forests special project


Excellent.
  • Removes the Migrating Forests planetary feature from the colony

Forest Adaptation

Continued interaction between our colonists and the wandering forests on [colony name] has revealed that the trees are in possession of some form of rudimentary communal intelligence. They seem to have adapted to our presence, and now go out of their way to avoid damaging the property of our colonists even without the use of the insect pheromone. Spirits among the colonists have risen.


 
Trigger conditions:
  • Finished the Study Migrating Forests special project
Mean time to happen:

Time 240 months


Excellent.

The planet gets for 10 years the modifier:

Forest Adaptation

  • +20% happiness
The forests and colonists on this world have adapted to each other, raising spirits for a time.

Mineral Deposits


We have discovered several significant mineral deposits that had previously been obscured by the roving forests on [colony name]. Now that the trees have been reduced to ashes, the deposits are easy to access.

 
Trigger conditions:
  • Finished the Burn Migrating Forests special project
Mean time to happen:

Time 240 months


Excellent.
  • Minerals Gained: 100-1000

Forest Research


We have learned a great deal by living in proximity of the wandering forests on [colony name]. Some enterprising colonists have even built homes in the treetops of some of the larger specimens, following the forests around as they migrate across the planet. Some of the foremost biologists in the [empire name] have spent time studying these unique trees.

 
Trigger conditions:
  • Finished the Study Migrating Forests special project
Mean time to happen:

Time 240 months


Excellent.
  • Society Research Gained: Society research 500-1000000

Precious Metal Deposit


We have discovered a significant deposit of precious metals that had previously been obscured by the roving forests on [colony name]. Now that the trees have been reduced to ashes, the deposit is easy to access.

 
Trigger conditions:
  • Finished the Burn Migrating Forests special project
Mean time to happen:

Time 240 months


Excellent.
  • Energy Credits Gained: 100-1000

Forest Fire

A forest fire caused by lightning on [colony name] created something akin to a stampede among the [planet or moon]'s wandering forests. Their wild panic brought them into areas they had previously avoided, resulting in widespread damage to the colony's terrain.


 
Trigger conditions:
  • Finished the Study Migrating Forests special project
Mean time to happen:

Time 240 months


Unfortunate.

The planet gets for 10 years the modifier:

Forest Fire

  • −20% food from jobs
A forest fire resulted in a stampede by this world's wandering forests, causing temporary damage to several farming regions.

Ecological Damage

It would appear the migrating forests we exterminated on [colony name] played a more vital role in the [planet or moon]'s ecology than previously thought. The wildfires we started and the absence of the forests have led to the extinction of several local species, resulting in a domino effect that has claimed several species of predators as well.

Efforts are ongoing to at least partly restore the fragile ecological balance by introducing new flora and fauna from other worlds, but it is a difficult process that will take time.


 
Trigger conditions:
  • Finished the Burn Migrating Forests special project
Mean time to happen:

Time 240 months


Unfortunate.

The planet gets for 10 years the modifier:

Damaged Ecology

  • −20% happiness
The destruction of the wandering forests on this world has had a significant effect on the ecology.

Wandering Forests Migrate


The colonial authorities on [colony name] have reported that one of the local wandering forests has migrated to another region on the [planet or moon]! Hundreds of thousands of trees have uprooted and marched in unison to this new area, trampling everything in their path.

 
Trigger conditions:
  • Migrating Forests
  • Did not finish either special project
Mean time to happen:

Time 80 months


Peculiar.

Rise of the Trees


The migrating forests on [colony name] have resurfaced! We knew isolated pockets of their kind had survived in several remote areas, but they appeared dormant. It seems they used this reprieve to replenish their numbers, and they have begun to systematically attack our settlements.

Contrary to what we believed, they clearly possess some form of rudimentary intelligence, and they're out for revenge!

 
Trigger conditions:
  • Finished the Burn Migrating Forests special project
Mean time to happen:

Time 240 months


They must be stopped!
  • 3 Rampaging Forest armies invade the colony
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