Birds Turn Anti-Bird Spikes into Fortresses

European birds, specifically carrion crows and magpies, are using anti-bird spikes, designed to keep them away from human infrastructure, to build armored nests for their chicks. The birds repurpose the spikes by coiling them inward or incorporating them into the top of their nests, potentially serving as a base or protection against predators. While birds commonly use human-made objects for nest-building, this behavior is the first documented instance of birds using anti-bird spikes in this way. Scientists are intrigued by the possibility that magpies are using the spikes functionally, and further research is needed to determine if thorny materials help magpies raise more chicks. The study highlights the adaptability of urban wildlife and encourages embracing their presence rather than fighting against it.