Birds
The Bos's crash-and-recovery story. First Amsterdam-region breeding record was in the Bos in 1953. Reached 9 breeding pairs in 2020 (peak per amsterdamsebos.nl); crashed to 1 pair after the February 2021 frost; 2024–2026 has seen full recovery — the graph shows 136 observations in 2024, 115 in 2025, and already 39 in the first five months of 2026. More abundant now than at the pre-crash peak.

| Total observations in the Bos | 1,154 |
| First recorded | 1970-12-12 |
| Last recorded | 2026-05-21 |
| Max rarity tier | 2 — uncommon |
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.