Fig. 4From: Spreading of rodent infestations through a cityTulsa Phase Change Diagrams for 4 Migration Radii. The three phases are indicated by high dotted dividing lines. The true spreading rate β is unknown. If true infestation rates fall within 20% to 50%, the range of possible real-life β values is shown by the shaded region. a r = 400. b r = 450. c r = 500. d r = 550Back to article page