What feature is a hallmark for identifying the Whimbrel's head pattern?
Answer
A dark cap separated by a pale central crown stripe
One of the most reliable features used in the field for identifying the Whimbrel is the pattern displayed on its head. This pattern is characterized by a dark cap structure. Crucially, this dark cap is visually bisected or separated by a distinct pale central crown stripe running down the middle of the head. This specific configuration—the dark cap separated by the pale central stripe—is noted as being a hallmark feature, remaining highly visible even when the bird is viewed from a considerable distance, making it an essential diagnostic marker for observers.
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