Rebellious birds are making nests out of anti-bird spikes. Researchers from two Dutch natural history museums have collected the unusual nests for the first time - some which feature 1,500 pins.
The team from the Naturalis Biodiversity Center and the Natural History Museum Rotterdam have described the "remarkable behaviour" in scientific publication Deinsea as "an ultimate adaptation to life in the city". It started with the discovery of a huge nest in Antwerp in the courtyard of a hospital, which was spotted by one of the patients.
High up in a tree, magpies made a huge nest of up to 1,500 metal spikes. For this particular nest, birds had pulled as many as 50 metres (150ft) of anti-bird pins from the eaves.
