| Level 1 | Thriving Requirement 1: at least 8 objects or plants with the Bushes tag | | |
| Level 2 | Thriving Requirement 2: Water Surface Area; European Bison Fact Sheet | | |
| Level 3 | Release groups and release to the wild | | |
| Level 4 | Thriving Requirement 3: Food Grade 2; Fertility Level 1 (+15% fertility) | Before this level: an Observation Network (Observation Platform) in Poland Reserve and this species released in Poland Reserve | |
| Level 5 | Thriving Requirement 4: at least 50% native plants | | |
| Level 6 | Thriving Requirement 5: Mud Bath, at least 2; Fertility Level 2 (+30% fertility) | | |
