Category Nuances for petrel:

• larger,
• migratory,
• flying,
• pelagic,
• antarctic,
• higher,
• big,
• smaller,
• large,
• charismatic,
• breeding,
• abundant,
• sized,
• marine,

Simple Categories for petrel:

• seabird,
• predator,
• creature,
• bird,
• animal,
• prey,