Assertion: hoatzin's feature | /r/HasProperty | unique
Facets:
value: among pigeons
type: OTHER
value: to these fantastic creatures
type: OTHER
Source sentences:
text: The birds share some characteristics with another closely related class – Reptiles, but they also have some features that are unique to these fantastic creatures.
text: The hoatzin’s foot morphology combined with its unique internal features have prompted some scientists to assign the hoatzin to its own group, order Opisthocomiformes.
text: Many skeletal features of the Rodrigues solitaire and dodo that are unique among pigeons have evolved to adapt to flightlessness.