Penderfynwyd creu parth AIPZ ar ôl cael hyd i’r clefyd mewn adar caeth ar safleoedd yng Nghymru, Lloegr a’r Alban. Mae’r clefyd wedi’i weld hefyd mewn adar gwyllt ar nifer o safleoedd ledled Prydain.
The introduction of the AIPZ comes after the disease was detected in captive birds at premises in Wales, England and Scotland. The disease has also been detected in wild birds at multiple sites across Great Britain.