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Upright brown thrush standing amid oak leaves, attentive stance suggests vigilance, textured leaf bed
The noble, vigilant white sheepdog
Confident young woman wearing glasses and blazer pointing finger to eyes in a bright blue studio; vigilance alertness focus watchfulness.
Hispanic middle age woman points finger to eye in dimly lit clothing store building aisle; vigilance.
Man policeman points finger toward camera on amsterdam street wearing dark uniform and radio; seriousness duty vigilance.

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