Nuthatch (Family Sittidae)
Sittidae is a family of small passerine birds which has two subfamilies:
Sittinidae, which contains the single Genus Sitta containing about 24 species of nuthatches, which are found across Eurasia and North America.
Tichodromadinae, which contains one species, the wallcreeper, Tichodroma muraria, which is restricted to the mountains of south- ern Eurasia.
Its closest relatives are the treecreepers, and the two families are some-
times placed in a larger grouping with the wrens and gnatcatchers.
Crooked Run Valley