THE ANIMAL FILES

Grass snake

Natrix natrix

A strong swimmer still needs places to bask, lay eggs and overwinter.

The grass snake often searches near water for amphibian prey. Its life nevertheless spans pond margins, woodland edges and sheltered ground, with different places meeting different seasonal needs.[1]

Follow the evidence ↓
Grass snake
Image: Andreas Eichler · Commons · CC BY-SA 4.0
Food
Amphibians are prominent prey[1]
Movement
Strong swimmer[1]
Egg site
Warm decaying vegetation can be used[1]

Searching along an edge

Sight and chemical sensing help the snake search for frogs and toads near water. Prey is swallowed without constriction. Pond margins combine hunting opportunities with nearby terrestrial cover.[1]

Warmth above, shelter below

Open woodland and field margins can offer both refuge and basking opportunities. Winter shelter is often underground, where conditions are more stable. Seasonal movement reflects these changing requirements.[1]

Eggs borrow environmental heat

Females can lay leathery eggs in rotting vegetation. The warmth and moisture around the eggs support development, and newly hatched snakes begin independently. This is a different use of habitat from an adult hunting at the water’s edge.[1]

A COMMON MIX-UP

Does being a swimmer mean it stays in water all season?

No. Grass snakes also use terrestrial cover, basking sites, egg sites and winter shelters.[1]

TRY A LITTLE REASONING

Why connect pond conservation with nearby land?

Reveal the explanation

The snake’s prey search is only one requirement; eggs, thermoregulation and overwintering involve other sites.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Grass snake (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Natrix natrix (identity and classification)

Last fact check:

One discovery leads to another

Black mambaThe black in its name is inside the mouth.Dendroaspis polylepis ↗Yellow-bellied sea snakeAn ocean home does not mean drinking the ocean.Hydrophis platurus ↗Saharan horned viperThe horns can be missing from a horned viper.Cerastes cerastes ↗