“It’s like a joke, really,” says biologist Auke-Florian Hiemstra of Naturalis: “Even for me as a nest researcher, these are the craziest bird nests I’ve ever seen.”
“Just when you think you’ve seen it all after half a century of studying natural history, these inventive crows and magpies really surprise me again,” said Kees Moeliker
“An impregnable fortress,” says Hiemstra, “because the magpies appear to be using the pins exactly the same way we do: to keep other birds away from their nest.”
“If even bird-repellent sharp spikes are used as nesting material, apparently anything can end up in a bird’s nest these days. It doesn’t get any crazier than this, does it?” asks Hiemstra.
Rebellious birds make nests out of anti-bird pins
