The Westminster Collection - Honouring the nation's most important events and anniversaries with historic commemorative coins, stamps and collectables.

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Adder

Scientific name: Vipera Berus

Adult Size: 60 cm (24 in)

Adult Weight: 50 g (1.8 oz) to about 180 grams (6.3 oz)

Top Speed: 19.31km/h (12 mph)

Life Span: Uncertain, approx up to 20 years

Habitat: Rough, open countryside

Diet: Small rodents

Other interesting facts: Adders jaws are linked by extensible connective tissue so each of the four main bones can move independently. This means they are able to swallow items much larger than the width of their head.

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