Modifiers matching wildfowl:

• migratory,
• plus,
• resident,
• ornamental,
• breeding,
• herbivorous,
• aquatic,
• dead,

Simple categories matching breeding:

• bird,
• animal,
• waterbird,
• structure,
• organization,
• poultry,
• livestock,
• cattle,
• passerine,
• season,
• system,
• information,
• news,
• duck,
• seabird,
• songbird,
• characteristic,
• warbler,
• predator,
• creature,
• trait,
• facility,
• raptor,
• mammal,
• shorebird,
• waterfowl,
• rodent,
• method,
• pet,
• antelope,
• vertebrate,
• wildfowl,
• farm,