Modifiers matching waterbird:

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

Simple categories matching plus:

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