A second dead magpie robin has tested positive, in village near border with Shenzhen, mainland China.
Given their behaviour, and fact these villages some km apart, unlikely they were in contact in wild; odd that no other species yet found in Hong Kong with H5N1 this winter.
So, my guess still that they were captive birds; maybe a bird dealer or two has problems (and – yes, another guess – has tossed birds out; not as tho a dealer wants hassle from authorities).
[Emailed Agric, Fisheries and Cons Dept here re this – have they examined the birds to see if signs of captive origin; no reply as yet.]
Results from 1st bird show the H5N1 related to prevalent strains in mainland China poultry.