Olfactory deterrents or so-called ‘scented fences’ are intended to keep wildlife away from crops and urban green spaces and they are also proposed as a method to prevent accidents on infrastructure (Figure 5.4.3). Synthetically produced fragrances which imitate human or predator scents are often deployed. These products should be used only during short critical periods because animals become readily habituated (see Rationale box. Deterrents to wildlife).
