Modifiers matching waterbird:

• higher,
• threatened,
• large,
• herbivorous,
• larger,
• beautiful,
• feral,
• rare,
• size,
• coastal,
• breeding,
• migratory,
• majestic,
• wild,
• common,
• migrant,
• colonial,
• plus,
• small,

Simple categories matching plus:

• wildfowl,
• waterbird,
• instrument,
• ride,
• event,