[Logical Extinction]

The pattern of spread strongly suggests that the virus has been carried by people smuggling poultry, a practice reportedly widespread in southeast Asia. Some experts blame migratory birds, but there is no evidence of this.

It is certainly true that in regions with big outbreaks in poultry, local wild birds are being affected. There are reports of mass die-offs of rare birds in zoos in Thailand, and pigeons are said to be piling up in the streets of Bangkok.

However, regular monitoring of migratory birds in Thailand has not revealed any signs of the virus.

[Logical Extinction]

Cluck