Sightings of polecat in Norfolk have increased recently, but is this native predator good for our wildlife? Norfolk Wildlife Trust Reserves Officer Robert Morgan investigates

The successful re-introduction and re-establishment of an animal by wildlife conservationists is often announced with a fanfare.

Be it beaver, that are now living wild in Britain, the propagation and release of the large blue butterfly, or the amazing revival of red kite and otter, both of which can now be found in every county of the UK.

All these creatures have one thing in common; it was human activity that led to their decline or extinction, but our intervention and efforts that brought about their recovery.