12th September 1997 at 01:00

Eagle-eyed young people aged up to 19 are asked to spot nine differences between two pictures of a suburban scene in this competition on the theme of using water wisely. It is run by the Young Ornithologists' Club (the junior section of the Royal Society for the Protection of Birds) and closes on September 26. Top prize is a pair of Viking binoculars, and 10 runners-up will receive the Usborne Book of Bird Facts. Details: YOC, Department N3481, The Lodge, Sandy, Bedfordshire SG19 2DL.

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