What behavior should an observer employ immediately after hearing the vireo's call from a dense tangle?
Answer
Stop moving and listen intently.
When the characteristic song or the sharp *churr* call is detected emanating from the dense cover, the recommended immediate action is to cease all movement and listen very carefully. This pause allows the observer to pinpoint the exact location and gauge potential subsequent movements, as sudden attention or movement can easily startle the secretive bird into retreating deeper into the protective brush.

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