Modifiers matching wildfowl:

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

Simple categories matching resident:

• bird,
• animal,
• herbivore,
• songbird,
• activity,
• applicant,
• game,
• predator,
• mammal,
• pet,
• prey,
• amphibian,
• organism,
• waterfowl,
• care,
• ungulate,
• item,
• visa,
• rodent,
• program,
• fish,
• seabird,
• cell,
• wildfowl,
• pathogen,