Multiple reports describe research and expert observations indicating that crows can remember specific human faces and show long-lasting behavioral responses after negative interactions. Times of India says crows demonstrate strong long-term memory in experiments, and that they may remain wary or act aggressively toward particular people for extended periods, with cases suggested to last as long as 17 years. Economic Times similarly emphasizes that crows “never forget” a face, and that grudges can persist for nearly a decade or longer, potentially approaching two decades. Both outlets link heightened aggression to the nesting period, when parent crows defend their nests and chicks, often targeting people they associate with harm or disturbance. Economic Times adds that crows can pass information about individuals to their offspring, teaching chicks to remember and avoid the same face. The sources also note that interactions can improve when people build trust, with Economic Times stating that kind gestures can lead crows to treat helpful humans more favorably.