Fungi
Perennial bracket fungus with concentric annual growth zones. First Bos record: 2015 (forest age 81) — even later than Trametes versicolor, because it requires larger-diameter dead wood. Its appearance is a forestry milestone: the Bos is finally maturing into something more than a young plantation.

| Total observations in the Bos | 196 |
| First recorded | 2015-06-10 |
| Last recorded | 2026-05-20 |
| Max rarity tier | 1 — common |
Data derived from 136,107 waarneming.nl observations at location 5013 (Amsterdamse Bos), scraped May 2026. Bos-context text: manually composed from the Bosplan 2020–2030, amsterdamsebos.nl, and the existing Het Onzichtbare Zichtbaar dossiers.