Crows are social animals, and it would be very strange for the two factions to not intermingle (let alone just observe) and know what was really going on. Also

Crows are social animals, and it would be very strange for the two factions to not intermingle (let alone just observe) and know what was really going on. Also they are opportunistic animals, and won’t give up the chance to get a treat even if they consider you an enemy; where I live the crows consider me a threat and caw loudly and angrily peck at plants and the windows if they see me, but will take any food that I leave outside. The crow war is a good story, if only a bit suspect.