Just in case that anyone didn't notice there was a recent WHO report on this too.
Migratory birds can distribute viruses.
Outbreaks in domestic poultry and detections in wild birds
Based on data retrieved from the Food and Agriculture Organization’s Empres-i Global Animal Disease Information System, as of 24 January 2020, highly pathogenic H5 avian influenza viruses caused 24 outbreaks in domestic poultry in six countries between 30 December 2019 and 18 January 2020. Poland, Hungary, Slovakia, Romania and Czech Republic identified highly pathogenic avian influenza (HPAI) subtype A(H5N8) and Ukraine HPAI H5 with the N-type not reported. Poland and Germany also detected HPAI A(H5N8) in wild birds.
In most affected countries, HPAI A(H5N8) was last reported in spring 2017 when the largest outbreak in poultry and wild birds ever recorded in the Region took place in 2016/17, resulting in millions of birds being culled and high economic losses. Vigilance of the public and close collaboration between the public health, veterinary and environmental authorities is important in the coming weeks to ensure rapid detection of avian influenza viruses in birds and to protect human health.