Modifiers matching waterbird:

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

Simple categories matching plus:

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