Blue Butterflies and Ants

Scientists have developed a fast, cheap and reliable technique that vastly improves the chances of successfully reintroducing the endangered large blue butterfly to the UK.

The test can tell the difference between two ant species that look virtually identical to us, but which are far from it – at least from the rare butterfly’s point of view.

One type of ant is essential for the large blue’s survival, while the other spells almost certain death.

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