Assertion: owl's scream | /r/HasProperty | sharp whistles
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text: This owl's diverse array of calls includes piercing screams (most commonly uttered by females, especially when defending the nest), sharp whistles (for contact with fledglings) and short, barking alarm notes, as well as chuckles, growls, hisses, squawks, cat-like meows, soft coos and quavering cries.