Forschungsstufen
| Level | Unlocks | Research gate |
|---|---|---|
| Level 1 | Fertility Level 1 (+15% fertility) | |
| Level 2 | Common Rudd Fact Sheet | |
| Level 3 | Fertility Level 2 (+30% fertility) | Before this level: an Observation Network (Observation Platform) in Scottish Highlands and this species released in Scottish Highlands |
