Category Nuances for petrel:

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

Simple Categories for petrel:

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