Some birds are using antibird spikes to build their nests

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.

WELLUCK Bird Spikes for Small Birds Pigeons, 15 Feet /14 Strips Anti Bird Fence Spike, Nest Prevention Bird Off Spike Repellent, Stainless Steel, Smooth Polishing Harmless Deterrent : Patio, Lawn & Garden

How to Stop Birds from Nesting on Your House - Bird Spike Control

Prickly issue - PressReader

Birds Repurposing 'Anti-Bird' Spikes to Build Nests, Researchers Say

Birds get revenge by using anti-bird spikes in nests - BBC News

Birds Get Revenge by Using Human-Made Spikes in Nests As Weapons

How to stop birds nesting in your chimney - the complete guide

National Geographic - In an example of “the perfect revenge,” Eurasian magpies are ripping anti-bird barbs off buildings and using them to build armored nurseries for their chicks.

Birds have co-opted anti-bird spikes to build nests. Genius! - Vox