Bird Control Spikes Attached to Window Ledge, Close Up Slider Right

bird control spikes bird spikes pigeon spikes window sill windowsill control spikes window ledge bird proofing metal bird control stainless steel deterrent object antiroosting spike device movement outside roost modification day nonlethal prevent overcast anti roosting deter detail roost antiperching outdoors anti perching closeup perch prevention protect product efficient humane slider close up nobody bird attach no people pigeon slide ledge right