Modifiers matching waterbird:

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

Simple categories matching plus:

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