Assertion: dark cockatoo | /r/HasProperty | subfamily calyptorhynchinae
Facets:
Source sentences:
text: The dark cockatoos (subfamily Calyptorhynchinae) are sexually dimorphic and therefore comparatively easy to sex (see taxonomy section for guidelines), while the white cockatoos (subfamily Cacatuinae) do not display any difference in feather coloration and pattern between males and females.