Birds using humans' anti-bird spikes to build their nests: Dutch researcher
Birds, specifically magpies, are using the spikes humans install on their balconies and roofs to keep birds away to build and protect their nests, Dutch biologist and researcher Auke-Florian Hiemst
Source: Birds using humans' anti-bird spikes to build their nests: Dutch researcher (https://nltimes.nl/2023/07/12/birds-using-humans-anti-bird-spikes-build-nests-dutch-researcher)