Assertion: vireo's habit | /r/HasProperty | retained until autumn
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Source sentences:
text: This habit is retained until autumn, when, insects being scarce, the Vireo sallies forth to a short distance in pursuit of them, as they may chance to pass near the tree on which, in the silent mood of a Flycatcher, it stands erect, using the watchful side-glances peculiar to its tribe, as it anxiously expects the passage of its prey.