Category Nuances for migratory_bird:

• territorial,
• domesticated,
• general,
• mobile,
• real,
• wild,
• avian,
• small,
• migratory,
• valuable,
• terrestrial,
• diverse,
• charismatic,
• unique,

Simple Categories for migratory_bird:

• carrier,
• item,
• animal,
• bird,
• group,
• host,
• mammal,
• fauna,
• attribute,
• organism,