Deters birds from landing and roosting Whites Anti-Bird Spikes are designed to provide an effective deterrent of birds. The pointed spikes are a barrier to the birds, preventing them from landing on surfaces. Attach them to building ledges, balconies and backyard fences to prevent birds from landing. Anti-Bird Spikes are an excellent and cost-effective way to deter birds from landing or roosting on your home or property. Placed along edges and flat surfaces where birds like to perch, these humane spike strips prevent birds from causing mess and noise.