Assertion: rufous bellied kookaburra | /r/HasProperty | mobbed by smaller birds
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: Rufous-bellied kookaburras have been known also to hunt small vertebrates, but do so less frequently than the larger woodland kookaburras, and frequently are mobbed by smaller birds when it preys on their eggs or nestlings.