Adder

Adder

Vipera berus

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
20–30% · Possible
overall probability at Triglav National Park

📅 Monthly Probability

0–10
Jan
0–10
Feb
0–10
Mar
10–20
Apr
20–30
May
10–20
Jun
30–40
Jul
30–40
Aug
20–30
Sep
0–10
Oct
0–10
Nov
0–10
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

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 Triglav National Park?

About 25% of visitor-days record a Adder sighting in Triglav National Park, based on 39 observer-days of citizen-science data from GBIF.

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

July has the highest sighting rate for Adder in Triglav National Park in our monthly data.

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