Birds Are Using Anti-Bird Spikes to Build Nests, Research Finds

Researchers studied four bird nests from European cities — built by carrion crows and Eurasian magpies — made out of anti-bird spikes and strips usually found on urban buildings

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This bird nest becomes a 'fortress' using antibird spikes

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PDF) Bird nests made from anti-bird spikes

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Seller of bird spikes received the photo from a customer : r

They are outsmarting us' – birds build nests from anti-bird s

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Birds have been using anti-bird spikes to make nests

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

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Birds Are Using Anti-Bird Spikes to Build Nests, Research Finds