Birch – Residency
30th sighting in Iceland
Birch @73413
Jun 14 – Aug 13, 2026 · Iceland
Westfjords, Full Throat
Herring thick enough to make surfacing feel like showing off.
77 m
Deepest dive
3:01
Longest dive
68
Dives
- Sightings
- 5
- Days between first and last sighting
- 60
Dive stats modelled within real depth limits — not measured
Get actual dive data with Risa Deep →| Sighting | Seafloor | Sea temp | Deepest dive (modelled) |
|---|---|---|---|
| Jun 14, 2026 | 128 m | 7.7°C | 58 m |
| Jun 22, 2026 | 108 m | 8.0°C | 76 m |
| Aug 11, 2026 | 95 m | 8.3°C | 69 m |
| Aug 12, 2026 | 88 m | 8.8°C | 77 m |
| Aug 13, 2026 | 117 m | 8.9°C | 58 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
77 m
Deepest dive
3:01
Longest dive
68
Dives
27 m
Avg dive depth
5
Sightings
60
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 (88 m) and the published dive-behaviour distribution. Modelled, not measured.
Deep Effort Score
DeepPlace
Where this happened · Aug 12, 2026
measured- Seafloor depth
- 88 m
- Sea-surface temperature
- 8.8°C
- Distance from shore
- 3.0 km
Across the residency · 5 sightings
measured- Seafloor depth
- 88 m – 128 m
- Sea-surface temperature
- 7.7°C – 8.9°C
- Distance from shore
- 2.0 km – 4.0 km
Sources: GEBCO seafloor grid · NASA JPL MUR sea temperature · PacIOOS coastline distance
Source records
This activity is assembled from 5 catalogued encounters on Happywhale.