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Birds had already been spotted using upward-pointing anti-bird spikes as foundations for nests. In 2016, the so-called Parkdale Pigeon became Twitter-famous for refusing to give up when humans ...

As for the use of the anti-bird spikes, Dr. Mainwaring was curious to see “if the behavior spreads, if other magpies see their neighbors using these spikes in nests and think, That’s how you ...

Wherever there are anti-bird spikes and wherever there are crows and magpies, he said, more anti-spike nests are likely waiting to be found.

The scientists also mention a spike-embellished Carrion Crow nest reported in a 2009 paper and several reports from social media of birds interacting with rooftop anti-bird spikes—and even ...

The new research describes several magpie nests with anti-bird spikes used as the nesting material with the behaviour already seen among birds in the Netherlands, Belgium and Scotland.

The bird even fastened some of these spikes on the top to ward off intruders, a kind of defensive roof magpies often build with thorny branches, according to the report. "It sounds like a joke ...

But all the bird spikes closest to the nest, they were gone, and just a trail of glue was present. But, yeah, I think the magpie ripped them off the roof and used them in its own nest.

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 ...