{"fact":"Crows demonstrate sophisticated social behavior, reducing aggressive displays in repeated encounters with known rivals but resuming aggression with unfamiliar opponents.","context":"Crows displayed aggressive and/or submissive behaviour to opponents less frequently but more discriminatively in subsequent encounters, suggesting stable dominance based on memory, including win/loss outcomes of the first encounters and individual discrimination.","source":"K. Nishizawa; E.-I. Izawa; S. Watanabe, Neural-activity mapping of memory-based dominance in the crow: neural networks integrating individual discrimination and social behaviour control, 10.1016/j.neuroscience.2011.09.001","index":74}