Modifiers matching waterbird:

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

Simple categories matching plus:

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