Definitions:

1. A genus of birds commonly known as whistlers, found primarily in the Australasian region, including parts of Australia, New Zealand, the Pacific Islands, and parts of Southeast Asia. NOUN
   • Pachycephala are known for their distinctive song, which is a series of clear, whistled notes.
2. Arboreal insectivorous birds. NOUN
   • Pachycephalas often exhibit bold and inquisitive behavior, and can be easily observed in suburban gardens and parks.

Synonyms:

• genus pachycephala