nuthatch

n. Small bird which climbs up and down tree-trunks.

n. Any one of several species of birds of the genus Sitta, as the European species (Sitta Europaea). The white-breasted nuthatch (S. Carolinensis), the red-breasted nuthatch (S. Canadensis), the pygmy nuthatch (S. pygmaea), and others, are American.