Before revision:  In this case, for p_c<p < 1, the center of mass of the  prey and predator fronts travel at the same speed and the two fronts fluctuate, but remain close to each other.
After revision:  In this case, for p_c<p < 1, the center of mass of the fluctuating prey and predator fronts travel at the same speed and the two fronts fluctuate, but remain close to each other.