This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Georg Ritter von Frauenfeld. Georg Ritter von Frauenfeld Botanik und Zoologie in sterreich in den Jahren bis org page page Creator Theodor Mayerhofer PDold Georg Ritter von Frauenfeld
Page 2023 Free-images.com. All images are Public Domain