Westminster Council removes anti-bird spikes from tree - BBC News

Bird spikes to be removed from trees after animal welfare backlash

Spikes on trees in Oxford to 'stop bird poo' - BBC News

Westminster Council removes anti-bird spikes from tree

Birds get revenge by using anti-bird spikes in nests

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Anti-bird spikes fitted to Clifton trees to 'protect' expensive cars from bird poo - Bristol Live

Council to remove anti-bird tree spikes

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Westminster Council removes anti-bird spikes from tree - BBC News