IRBBP also monitors the status of non-native breeding birds:

Black Swan Cygnus atratus
Greylag Goose Anser anser
Canada Goose Branta canadensis
Barnacle Goose Branta leucopsis
Muscovy Duck Cairina moschata
Wood Duck Aix sponsa
Mandarin Duck Aix galericulata
Ruddy Duck Oxyura jamaicensis
Red-legged Partridge Alectoris rufa
Rose-ringed Parakeet Psittacula krameri