Bird spikes are designed to deter birds from roosting in desirable areas. . Bird spikes aren't designed to hurt birds. In fact, the spikes are blunt, which prevents injury to birds and workers installing them Benefits of Bird Spikes - Prevent damage to property - Protects against health hazards from bird droppings - Maintains cleanliness and aesthetics of property - Saves money on costly repairs - Eliminates birds from nesting under eaves and solar panels.