To which taxonomic family do the small, acrobatic birds known as nuthatches formally belong?

Answer

Sittidae

The formal scientific classification places all nuthatches within the family Sittidae, although historically they were sometimes grouped broadly within the superfamily Certhioidea which includes treecreepers.

To which taxonomic family do the small, acrobatic birds known as nuthatches formally belong?
taxonomybirdanimalNuthatch