A little bird lost is causing a huge flutter. More than 600 people, some from as far as Cape Town, have come to Johannesburg to get a glimpse of a bird that is not quite the size of a chicken.The bird is a spotted crake and it has pitched up at a pond at Waterfall Estate, Midrand.Spotted crakes, said Trevor Hardaker, chairman of Bird Life SA's rarities committee, usually migrate only as far south as Zambia or Zimbabwe. But this one kept on going.It is not the only one. It has been a strange summer for spotted crakes.There have been sightings of at least a dozen crakes around the country.The rarities committee tracks sightings of rare birds and was notified of the Midrand crake on Thursday."They are normally reclusive but this one is parading around in the open," said Hardaker.The wayward spotted crake and its far-roaming fellows, such as the snowy egret that visited Cape Town last year, are helping to generate tourist dollars.Avi-tourism is becoming a draw, particularly in towns such as Wakkerstroom, to where birders flock from around the world.A 2009 report by the Department of Trade and Industry put the take from the bird-tourism industry at between R1-billion and R1.7-billion."We have a group coming through every second or third day," said Kristi Garland, Bird Life SA's manager in Wakkerstroom."The big groups come from Germany, the UK and the US."They are mainly coming to see, she said, endemic species such as the yellow-breasted pipit and the blue korhaan...