Permanent claim record · Isle Royale National Park
By 2015-2017, severe inbreeding had reduced Isle Royale's wolf population to just 2 animals; in 2018 the NPS began introducing 20-30 new wolves from Minnesota and elsewhere.
| Predicate | trivia.fact |
|---|---|
| Subject | Isle Royale National Park (venue) |
| As of | 2018-01-01 |
| Status | Verified |
| Source | Famous Michiganders, Pop Culture & Trivia Report — Perplexity Deep Research (2026) (trust 6.5/10) |
| Reference | — |
| Document hash | pending evidence-pack link |
| Provenance chain | |
| Claim ID | 2873e754-9115-4911-b35e-33d32a94a75f |