Phocoena phocoena
Silhouette: Chris huh · PhyloPic
In 3 days ~30% in a week ~60%
The harbour porpoise (Phocoena phocoena) is one of eight extant species of porpoise. It is one of the smallest species of cetacean. As its name implies, it stays close to coastal areas or river estuaries, and as such, is the most familiar porpoise to whale watchers. This porpoise often ventures up rivers, and has been seen hundreds of kilometres from the sea.
The English word porpoise comes from the French pourpois (Old French porpais, 12th century), which is from Medieval Latin porcopiscus, which is a compound of porcus (pig) and piscus (fish). The old word is probably a loan-translation of a Germanic word, compare Danish marsvin and Middle Dutch mereswijn (sea swine). Classical Latin had a similar name, porculus marinus. The species' taxonomic name, Phocoena phocoena, is the Latinized form of the Greek φώκαινα, phōkaina, "big seal", as described by Aristotle; this... Wikipedia →
Recording0:19
Denmark · 2026
© age02 · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Acadia National Park | 🇺🇸 United States | |
| 2 | Wadden Sea National Park | 🇩🇪 Germany | |
| 3 | Great Bear Rainforest | 🇨🇦 Canada | |
| 4 | Snowdonia National Park | 🇬🇧 United Kingdom | |
| 5 | Pacific Rim National Park Reserve | 🇨🇦 Canada | |
| 6 | Olympic National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Liverpool | 🇬🇧 United Kingdom | |
| 2 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 3 | Istanbul | 🇹🇷 Turkey | |
| 4 | Seattle | 🇺🇸 United States | |
| 5 | San Francisco | 🇺🇸 United States | |
| 6 | Vancouver | 🇨🇦 Canada |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Dierenpark Hoenderdaell | 🇳🇱 Netherlands |
No species of the same family or order lives in Snowdonia National Park, so these are its closest relatives here: other mammals.
With luck
About 10% of wildlife watchers report a Common Porpoise sighting in Snowdonia National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 15 mammals we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
January
In that month about 30% of wildlife watchers report a Common Porpoise in Snowdonia National Park on a given day, against under 5% in February, April and September–December, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Porpoise sightings with a recorded time, and about 7 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 parks where we can rate Common Porpoise sightings, Snowdonia National Park ranks 4th at about 10%. The best odds are in Acadia National Park (United States, about 20%), Wadden Sea National Park (Germany, about 10%) and Great Bear Rainforest (Canada, about 10%).
GBIF citizen-science records
It is estimated from how often the Common Porpoise is recorded against all the mammals logged in Snowdonia National Park (6 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
