Yes, paper showing live ducks capable of flying with H5N1; haven’t shown they actually transmit it, tho of course plausible.
But wild birds are involved. The team found H5N1 in six apparently-healthy migratory ducks at Poyang Lake in Jiangxi province, which borders Guangdong and Hunan, in January and March 2005, before the northward migration. The isolates had all the genes, and certain specific mutations, later found in geese at Qinghai Lake, 1700 kilometres northwest. And this virus, notes Peiris, is very like H5N1 in Turkey.
but, these places not linked by major migration routes; Poyang winter birds don’t – for vast majority – move to Qinghai, instead to Mongolia, ne China and beyond.
Just had a read of paper; plenty of questions arise tho too tired after long day in field to do much now; may open separate thread.