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#1474 · 🦎 reptiles

Common Slowworm

🇳🇱 Hazelworm ·Anguis fragilis

LCleast concern 🦎 Reptiles 📍 in the Netherlands
Common Slowworm, photo 1 of 10
1/10 © royc614 · CC BY-NC 4.0

what is it?

Anguis fragilis , the slowworm , is a legless lizard native to Eurasia. It is also called a blindworm , deaf adder or, regionally, a long-cripple ; to distinguish it from the Peloponnese slowworm, it is also sometimes called a common slowworm . The 'blind' in 'blindworm' refers to the lizard's small eyes, similar to a blindsnake (although the slowworm's eyes are functional).

base stats

  • NL sightings 561iNaturalist, research grade
  • worldwide 49,173iNaturalist observations
  • threat LCleast concern

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • Spotted 561 times in the Netherlands on iNaturalist: the #2 most seen of the reptiles in NL.
  • 49,173 observations worldwide on iNaturalist.
  • Scientifically named in 1758 (268 years ago).

fact sheet

English
Common Slowworm
Nederlands
Hazelworm
scientific name
Anguis fragilis
class
Reptilia
order
Squamata
family
Anguidae
IUCN Red List
LC · least concern
sightings in NL
561
sightings in Europe
47,389
sightings worldwide
49,173
GBIF records in NL
41,393
weight
—
length
—
lifespan
—
named
1758

IUCN in Dutch: niet bedreigd. Blank means the sources don't say.

relatives· Anguidae

Sources: iNaturalist taxon 343021, Wikidata Q183660, GBIF 2468095, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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