Andrzej Węgiel, PhD, and Jolanta Węgiel, MSc, Eng, by education and vocation are forestry scientists, both working at the Nature Science University in Poznań. But at the same time they both are bat researchers, travellers, activists and educators. They are authors of many publications, scientific and popular, and engage into nature conservation, especially protection of bats. Their activity was crucial in recovery of the lesser horseshoe bat population in Poland, and in planning of conservation activities, including Programme for the Conservation of the Lesser Horseshoe Bat. Both of them have substantial achievements in popularisation of knowledge about bats, and in shaping friendly attitude towards these animals.