Bird Spikes, 20 Pack Pigeon Spikes, High Thorn Bird Spikes for Outside, Bird Deterrent for Small Bird Cat Squirrel, Easy Installation Bird Deterrent Spikes use for Balcony Courtyard Outdoor RoofBrand: Geulieby Color: Black Features: HUMANE BIRD DETERRENT SPIKES: Are you tired of constantly dealing with bird droppings? Bird spikes for outside are an effective, humane solution. This will not cause great harm to birds or people. BIRD DETERRENTS FOR OUTSIDE: Bird spikes adding a lot of small nails, the unique high spikes design makes it impossible for birds to stand and stay around. Perfect for pigeons, sparrows, crows, seagulls etc. NO MORE