Assertion: american crow | /r/CapableOf | fluff their throat feathers
Facets:
Source sentences:
text: They can be distinguished from the common raven (C. corax) because American crows are smaller, from the fish crow (C. ossifragus) because American crows do not hunch and fluff their throat feathers when they call and from the carrion crow (C. corone) by the enunciation of their calls.