Post #3877

Do migratory birds save energy escaping winter? ✔️ Scientists have long surmised that birds migrate during winters to save energy: far away from the biting cold, birds would need to expend less energy to keep themselves warm. ✔️A new study has shown that migratory lifestyle carries no added overall energy cost. ✔️ Scientists have found partially migratory Eurasian blackbirds (Turdus merula)⬆️ migrating to warmer regions in winter didn’t save more energy compared to members of the same species that stayed behind. ✔️ To measure the birds’ heart rate and body temperature over the course of the winter, researchers used surgically implanted biologgers. ✔️ It was also found that migrating birds started saving energy for migration by lowering their heart rate and body temperature almost a month before their departure. ✔️ The research raises important questions on why birds migrate if there’s no energy benefit, and where the unaccounted energy is being used instead. Subscribe- t.me/askmenow