Pigeon fanciers have likened part of the north of England to the Bermuda triangle after losing hundreds of racing birds.
Experts are baffled at the phenomenon, with abnormally high rainfall, high levels of solar activity and even signals from a spy base being blamed.
Pigeon fanciers have compared it to the disappearance of ships and aircraft in an area of the Atlantic bounded by Miami, Bermuda and Puerto Rico.
But their mystery triangle centres on a geographical area encompassing Thirsk, Wetherby and Consett.
In the latest episode, only 13 out of 232 birds released in Thirsk by a Scottish pigeon racing club made it back to Galashiels in the Scottish Borders.
Keith Simpson, of the East Cleveland Federation of pigeon fanciers, said racers across the region had suffered huge losses since the season started in April, with many losing more than half their birds.