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Surveying for this shy but surprising snake, with its distinctive black zigzag, on the top of the Quantock Hills.

A female adder snake

We have undertaken a number of monitoring schemes aiming to identify adder populations and distribution.

The adder (Vipera berus) is a small snake with adults measuring between 60 and 80cm. Adders like to live in woodland, heathland and rough grassland. They prey on small mammals, amphibians, birds, and reptiles, and are preyed upon by birds of prey and larger mammals.

Nationally, population numbers have declined significantly. This is thought to be due to habitat loss. On the Quantock Hills we are keen to understand where adders hibernate (called hibernaculums) so we can better manage the habitat.

If you see an adder please let us know or use the iNaturalist app.

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