The wasp spider was discovered by Craig Clavin and his children, Ralph and Hugo, in their garden in Oby, near Acle, last week.
The spider, known for its vivid black and yellow stripes and dramatic zigzag web, was once a rarity in the UK but is now slowly spreading due to warmer summers.
“I’d never seen one before – it’s quite large and looks completely out of place on the Norfolk Broads,” Mr Clavin said.
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“It’s such a beautiful creature. A perfect example of how wildlife is changing right on our doorsteps.”
Wasp spiders are completely harmless to humans and are a fascinating addition to the UK’s growing biodiversity.
Originally native to southern Europe, they are now occasionally found in East Anglia – but still remain a highly unusual sight in gardens.
The spider can usually only be seen between April and October.
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