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(a,b,c) Sonograms from recordings; of drongo-specific chink alarm calls made in true and false contexts by three drongos; of true alarm calls made by model species in response to predators, and mimics of these calls made by drongos in false alarms: (d) glossy starling, (e) crowned plover, and (f) pied babbler. Photo credits: T. Flower, M. Boerner.
