bazzalunatic writes "The common golden orb web spider wards off ants from attacking it on its web by spinning an ant repellent (pyrrolidine alkaloid) into its silk. It could be used to develop a new insect repellent for humans. 'This study is among the first to show animals incorporating a chemical defence as a response to the threat of predation,' says Professor Mark Elgar of the University of Melbourne."
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