Adder

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

#	Park	Country	Probability
1	Tatra National Park	🇸🇰 Slovakia	40–50%
2	Snowdonia National Park	🇬🇧 United Kingdom	30–40%
3	Cairngorms National Park	🇬🇧 United Kingdom	30–40%
4	Bavarian Forest National Park	🇩🇪 Germany	30–40%
5	Triglav National Park	🇸🇮 Slovenia	20–30%
6	Wadden Sea National Park	🇩🇪 Germany	10–20%
7	Gauja National Park	🇱🇻 Latvia	Insufficient data
8	Biebrza National Park	🇵🇱 Poland	Insufficient data
9	Białowieża National Park	🇵🇱 Poland	Insufficient data
10	Cévennes National Park	🇫🇷 France	Insufficient data

Quick answers

What are the chances of seeing a Adder in Snowdonia National Park?

About 37% of visitor-days record a Adder sighting in Snowdonia National Park, based on 71 observer-days of citizen-science data from GBIF.

When is the best time to see Adder in Snowdonia National Park?

March has the highest sighting rate for Adder in Snowdonia National Park in our monthly data.