¶ Lutra lutra
¶ Otter (Eurasian otter)
Mammals
¶ Why this species, in the context of the Amsterdamse Bos
The most surprising find in the entire graph. First Bos record: 23 January 1930 — four years before construction began on the Bos. Further records through 1942, 1944, 1946, 1952 — then 74 years of silence. The species returned in 2026: confirmed observations on 2026-03-31 at Koenenbos and 2026-05-07 in the Bos. The prior dossier still states 'NOT confirmed as of 2025' — that needs updating.
¶ Facts from the graph
| Total observations in the Bos | 7 |
| First recorded | 1930-01-23 |
| Last recorded | 2026-05-07 |
| Max rarity tier | 3 — notable |
¶ Top sub-locations within the Bos
- Amsterdamse Bos — 2 observations
- Amsterdamse Bos - Grote Vijver - Grote Speelweide — 2 observations
- Amsterdamse Bos - Koenenbos — 1 observations
- Amsterdamse Bos - Bosbaan - Duizendmeterweg — 1 observations
- Amsterdamse Bos - Oeverlanden - Koenenkade — 1 observations
¶ Explore
- View this species on the Bos map → (all observations, plotted geographically)
- Species page on waarneming.nl
- Bos-filtered observation list on waarneming.nl
- One example observation
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.