ANTI-CLIMB SPIKES on your garden fence can help add security to your home – but you could find they are more trouble than they’re worth. Fences can be a cause of dispute between neighbo… ...

Made from plastic or metal, anti-climb spikes are installed at the top of your fence to serve as a physical barrier and visual deterrent.

Magpies are using anti-bird spikes for their own purposes.

Strips of sharp metal pins are meant to keep birds away from buildings. Some birds are stealing them to build their nests.

A crafty Eurasian magpie stuck together some 1,500 anti-bird spikes to build a fortified, two-foot-wide nest.

The spikes were meant to keep birds away. But five corvid nests in Europe use the bird-deterrents as structural support and to ward off predators.

Crows and Magpies Snatch Anti-Bird Spikes to Build Their Nests Birds in Europe are prying up the metal barbs, meant to repel them from roosting on buildings, and using the devices as nesting material ...

Research in Europe shows birds are protecting their nests with spikes installed on buildings to prevent them from perching.