Modifiers matching waterbird:

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

Simple categories matching migratory:

• fish,
• organism,
• insect,
• finch,
• bird,
• seabird,
• animal,
• host,
• waterfowl,
• clupeid,
• herbivore,
• prey,
• beast,
• creature,
• predator,
• shorebird,
• pollinator,
• bat,
• vertebrate,
• waterbird,
• wildfowl,
• giant,
• feature,
• ungulate,
• songbird,
• pest,
• species,
• goose,
• orthopteran,
• activity,
• cell,
• mammal,
• shark,
• crustacean,