The Eurasian Nuthatch (Sitta europaea) is a small bird occurring within a vast region including most of Europe and northern Asia. The birds are famous for their extraordinary climbing abilites and can descend trees head first. They forage for insects and other small invertebrates on the bark of trees or bushes, but they are also common visitors at bird tables in the winter season where they supplement their diet with nuts and seeds. The birds favor woodlands as their habitats and often breed in tree holes originally inhabited by wood peckers. If the entrance to these caves is too large, they plaster it with mud to reduce their size. I have photographed these birds in Germany where the European Nuthatch is one of the most abundant species.