Birch – Residency
25th sighting in Iceland
Birch @73413
May 28 – Aug 27, 2025 · Iceland
Iceland · May – Aug 2025
100 m
Deepest dive
4:20
Longest dive
146
Dives
- Sightings
- 10
- Days between first and last sighting
- 91
- Deepest dive on record
- 100 m · this residency
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| May 28, 2025 | 13 m | — | 11 m |
| Jul 9, 2025 | 104 m | — | 38 m |
| Jul 14, 2025 | 114 m | — | 100 m |
| Jul 16, 2025 | 125 m | — | 81 m |
| Jul 22, 2025 | 125 m | — | 79 m |
| Jul 28, 2025 | 111 m | — | 75 m |
| Jul 31, 2025 | 125 m | — | 32 m |
| Aug 4, 2025 | 124 m | — | 53 m |
| Aug 9, 2025 | 131 m | — | 91 m |
| Aug 27, 2025 | 125 m | — | 79 m |
Seafloor and sea temperature measured · ✳ dives modelled
Deepest dive against the seafloor, per sighting
Seafloor · measured Deepest dive · modelledDepth runs down from the surface. The modelled dive never passes the measured seafloor at that sighting.
Dives
100 m
Deepest dive
4:20
Longest dive
146
Dives
25 m
Avg dive depth
10
Sightings
91
Days first → last
Dive metrics are modelled within real depth limits — not measured
Get actual dive data with Risa Deep →Dive profile
modelledDepth shaped by the seafloor limit here (114 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Jul 14, 2025
measured- Seafloor depth
- 114 m
- Sea-surface temperature
- —
- Distance from shore
- 7.0 km
Across the residency · 10 sightings
measured- Seafloor depth
- 13 m – 131 m
- Sea-surface temperature
- —
- Distance from shore
- 1.0 km – 7.0 km
Sources: GEBCO seafloor grid · PacIOOS coastline distance
Source records
This activity is assembled from 10 catalogued encounters on Happywhale.