Modifiers matching wildfowl:

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

Simple categories matching resident:

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