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But when things really heat up, they adjust their body temperature in relation to the air temperature through strategies called thermal buffering and thermal tolerance. Thermal buffering includes physical acts like moving into a cooler, shadier area or slanting wings out of the direct path of sunlight. “These are molecules that many animals, butterflies and humans included, produce to protect themselves from high temperatures,” Ashe-Jepson said. For the thermal buffering test, the researchers caught, tested and released 1,334 butterflies representing 54 species from six butterfly families. To test thermal tolerance, a smaller group of the captured butterflies was put to work one more time.
Persons: , , Esme Ashe, Jepson, ” Ashe, , Ashe, Akito Kawahara, they’ll, ” Kawahara Organizations: CNN, University of Cambridge, Smithsonian Tropical Research, McGuire, University of Florida Locations: United Kingdom, Panama, Biodiversity, Gainesville
CNN —The world’s largest butterfly tree of life is helping researchers determine where the winged insects originated when they first appeared on Earth about 100 million years ago. Scientists first uncovered in 2019 how this single shift to daytime activity served as the evolutionary turning point for all butterfly species. Together, the researchers collected DNA from nearly 2,300 species from 90 countries that represent all butterfly families. “We used multiple fossils for the study in order to calibrate particular parts of the tree,” Kawahara said. “Europe doesn’t have many butterfly species compared to other parts of the world, and the ones it does have can often be found elsewhere,” Kawahara said.
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