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Butterflies create jet propulsion with a clap of their wings, study shows | Life


Wednesday, 20 Jan 2021 11:51 AM MYT
This handout picture taken in June 2018 released on January 19, 2021 by the Lund University shows a Silver-washed fritillary butterfly close to the Lund University field station Stensoffa, outside Lund, in Southern Sweden. AFP pic
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PARIS, Jan 20 The whimsical, wafting flight of butterflies may not give the impression of top aerodynamic performance, but research published yesterday suggests their large flexible wings could be perfectly designed to give them a burst of jet propulsion.
Scientists at Lund University in Sweden set out to verify a decades-old theory that insects “clap” their wings together, squeezing out the air between with such force that it thrusts them forward. ....

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UK butterfly population has been cut in HALF over the past 45 years


Since 1976, overall butterfly numbers have declined by around 50 per cent
One of the key issues is meadow destruction, meaning butterflies lose their key food sources and breeding grounds
Butterflies are without a doubt one of the most beautiful insects in the UK, but a worrying new study has found that their numbers are dwindling.
The research reveals that the UK butterfly population has been cut in half over the past 45 years.
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Worryingly, almost one in ten British butterfly species has become extinct due to meadow destruction, meaning the loss of key food sources and breeding grounds for the insects. ....

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