Working on European Ephemeroptera since 2016. Studying Sciuridae worldwide as a hobby since 2019. Some knowledge about Neuroptera (NW-Europe), Mecoptera (NW-Europe), Raphidioptera (NW-Europe), Siphonaptera (NL+B) and Archeognatha (NL+B). Wide interest in birds, mammals, fish, insects, plants, crustaceans and some other groups. All my observations are on Observation.org: https://observation.org/users/22414/