Which two characteristics often betray the presence of the Pine Siskin before a clear visual identification is made?
Answer
A yellowish wash in the wing bars and near the base of the tail feathers, and their sharp, high-pitched "tseet" calls
Pine Siskins are often first noticed due to their sharp, high-pitched "tseet" calls, and visually they show a yellowish wash in the wing bars and near the tail feathers.
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