Mewn Parth Atal, rhaid i geidwaid dofednod ac adar caeth eraill gadw eu hadar dan do neu gymryd pob cam priodol i’w cadw nhw ac adar gwyllt ar wahân, a gwella’r mesurau bioddiogelwch ar eu heiddo.  Cyflwynwyd mesurau tebyg yn Lloegr a’r Alban, gan sicrhau bod yr un drefn mewn grym ledled Prydain.  Cyhoeddodd Gogledd Iwerddon ddatganiad ar Barth Atal Ffliw’r Adar ar 23 Rhagfyr 2016.
The Prevention Zone requires all keepers of poultry and other captive birds to keep their birds indoors or take all appropriate steps to keep them separate from wild birds and to enhance biosecurity on their premises. Similar measures were introduced in England and Scotland, ensuring a co-ordinated approach across Great Britain. Northern Ireland declared an Avian Influenza Prevention Zone on 23 December 2016.