In recent decades scientific data, particularly ringing recoveries, have uncovered some of the migration secrets of many species of European bat. For example, we now know that at least four species of bat (Nathusius' Pipistrelle, Noctule, Leisler's Bat and Parti-coloured Bat) migrate vast distances from northeastern Europe to the southwest of the continent to spend the winter. Through ringing recoveries, certain individuals have been shown to fly huge distances, with record one-way autumn migrations of Nathusius' Pipistrelle and Parti-coloured Bat totalling 1,905 km (Latvia to France) and 1,787 km (Russia to France) respectively.
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