A wolf swam 1.5 kilometres across lake Lucerne, becoming the first such animal to be documented displaying this behaviour in Switzerland. + Get the most important news from Switzerland in your inbox According to GPS coordinates, the wolf was present on both sides of the lake within a 90-minute time span on February 13. + How many wolves are good for Switzerland? "At first, I looked for scenarios in which the animal had actually walked around the lake,” biologist Flurin Kunz of the Kora Carnivore Ecology and Wildlife Management Foundation told Swiss public broadcaster SRF. "A complete circuit of the lake would not have been possible for the animal in that timeframe.” The only possible explanation is that the wolf must have swum across the lake in central Switzerland in the five-degree Celsius waters. “But perhaps it's not so unusual after all. Theoretically, it would also be possible for dogs to swim this distance,” Kunz added. Since last October, the animal, designated M637, has ...