Flying Bird Product,Anti Bird Spikes 1)Cover ledges up to 205mm. 2)50cm(1.6ft) length is available,with "snap to size" bas Flying Bird Product,Anti Bird Spikes A bird control spike, also known as an anti-roosting spike or roost modification,is a device consisting of long, needle-like rods used for bird control. They can be attached to building ledges, street lighting, and commercial signage to ...