Iberian Grass Snake
Iberian Grass SnakeIberian Grass SnakeIberian Grass SnakeIberian Grass Snake

Iberian Grass Snake

Natrix astreptophora

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
20–30% · Possible
overall probability at Picos de Europa National Park
11 Verified records at Picos de Europa National Park
April Best month highest sighting rate
☀️ Diurnal When it's active during daytime hours (6am–6pm)

Natrix astreptophora, the red-eyed grass snake or the Iberian grass snake, is a species of natricine snake found in the Iberian Peninsula, south of France, and some coastal areas in the Maghreb, from Tangier to Tunisia. Long considered a subspecies of the European grass snake, Natrix natrix, the subspecies was split off from that taxon in 2016. Wikipedia →

20–30% of wildlife watchers report a Iberian Grass Snake sighting in Picos de Europa National Park, based on 11 days of visitor records from GBIF citizen-science data.

Closest Relatives at Picos de Europa National Park

Viperine Snake
LC

Viperine Snake

☀️ Diurnal Reptile

Natrix maura

10–20% · With luck
Smooth Snake
LC

Smooth Snake

🌅 Crepuscular Reptile

Coronella austriaca

20–30% · Possible

📅 Monthly Probability

10–20
Jan
5–10
Feb
5–10
Mar
40–50
Apr
10–20
May
30–40
Jun
20–30
Jul
<5
Aug
<5
Sep
<5
Oct
5–10
Nov
5–10
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 Picos de Europa National Park 🇪🇸 Spain
20–30%
2 Pyrénées National Park 🇫🇷 France
5–10%
3 Monfragüe National Park 🇪🇸 Spain
Insufficient data
4 Aigüestortes National Park 🇪🇸 Spain
Insufficient data
5 Sierra de Guadarrama National Park 🇪🇸 Spain
Insufficient data

Quick answers

What are the chances of seeing a Iberian Grass Snake in Picos de Europa National Park?

About 21% of wildlife watchers report a Iberian Grass Snake sighting in Picos de Europa National Park, based on 11 days of visitor records from GBIF citizen-science data.

When is the best time to see Iberian Grass Snake in Picos de Europa National Park?

April has the highest sighting rate for Iberian Grass Snake in Picos de Europa National Park in our monthly data.

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