A Duck Decoy showing the mouth of the tunnel. Wild duck were decoyed into the mouth of a net covering a curving ditch or 'pipe'. A dog was trained to drive birds to narrow end of the tunnel where they were caught and killed. A common practice on the Lincolnshire Fens and the Norfolk Broads. Most of the birds were sent to London for sale. From Scenes in England by the Rev. Isaac Taylor, London, 1822. Hand-coloured engraving.