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Lepidopterologists, butterfly researchers, are looking for butterflies on Saturday, 30 June 2018, in Urnenboden. Around 60 researchers will be searching for animal and plant species in Urnenboden on Nature's International Geo-Day. (KEYSTONE/Alexandra Wey)....Lepidopterologen, Schmetterlingsforscher, suchen nach Schmetterlingen am Samstag, 30. Juni 2018, in Urnenboden. Rund 60 Forscherinnen und Forscher suchen am internationalen Geo-Tag der Natur Tier- und Pflanzenarten ab in Urnenboden. (KEYSTONE/Alexandra Wey)