The darkness with short days and cold nights has settled in. The knights of night are now returning to their overwintering sites here in the northern Europe - we are talking about bats. Due to the cold winter with snow and temperatures plummeting far below zero degrees Celsius, the bats in Sweden are either forces to fly south like the migrating birds, or hibernate in caves, cellars or large trees. An unexpected collaboration started a few years ago between WWF Sweden and the swedish military…
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