Abstract: An animal deterrent device is disclosed which comprises an open lattice or grid of moulded low density polythene and having flexible spike formations projecting therefrom approximately normally thereto. The device is placable on the ground to cause discomfort to animals from stepping on them and thereby deter animals from the area protected by the device. In one embodiment the device is fixable in the ground by ones of said flexible spike formations entering into the ground, and in a second embodiment the device is fixable in the ground by means of anchor members normally lying in the plane of the device but which may be bent out of the plane of the device to extend to one side of the lattice or grid. The anchor members are in the form of broad arrows having triangular or barbed ends which act firmly to hold the device in a position in which it is placed.