Minute insect develops long-term memory

If a specific butterfly anti-sex scent is coupled with a pleasant experience, then parasitic wasps are able to develop long-term memory and respond to this scent that they do not instinctively recognise. After successfully 'hitch-hiking' with a mated female cabbage white butterfly and parasitising her eggs, the parasitic wasps are able to remember the route and navigate it again. Researchers from Wageningen University, Netherlands, reported this finding in this week's Proceedings of the National Academy of Sciences...

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