Systematic Notes on Asian Birds. 62. A preliminary review of the Sittidae

The Asian species of nuthatch have been reviewed several times in the last 50 years or so although the changes made have sometimes not appeared in the ‘primary’ literature, thus lack supporting explanations or sufficient detail. There continue to be puzzles over species limits, with a great need for molecular studies to inform on relationships as, morphologically, Sitta appears to be sufficiently varied to sustain two or more genera.