Member States shall introduce or reinforce early detection systems aimed at rapid reporting by the owners to the competent authority of any sign of avian influenza in poultry flocks kept on holdings located in high risk areas.

The systems referred to in paragraph 1 shall at least consider a significant drop in feed and water intake and in egg production, the observed mortality rate and any clinical sign or post-mortem lesion suggesting HPAI virus presence taking into account a variation of these parameters in different poultry species and production types.