<br><ul><li><b>1.</b> « <i>Periparus ater var. rufipectus</i> » = <i>Periparus ater rufipectus</i> (Subspecies of <a href="https://en.wikipedia.org/wiki/Coal_Tit" class="extiw" title="en:Coal Tit">Coal Tit</a>) - male</li>
<li><b>2.</b> « <i>Lophophanes dichroides</i> » = <i>Lophophanes dichrous dichroides</i> (Subspecies of <a href="https://en.wikipedia.org/wiki/Grey_crested_tit" class="extiw" title="en:Grey crested tit">Grey crested tit</a>)</li>
<li><b>3.</b> « <i>Sitta caesia var. amurensis</i> » = <i><a href="https://en.wikipedia.org/wiki/Sitta_europaea" class="extiw" title="en:Sitta europaea">Sitta europaea</a> amurensis</i> - female</li>
<li><b>4.</b> « <i>Sitta przewalskii</i> » = <i>Sitta przewalskii</i> (<a href="https://en.wikipedia.org/wiki/Przevalski%27s_nuthatch" class="extiw" title="en:Przevalski's nuthatch">Przevalski's nuthatch</a>) - female in worn plumage</li></ul>
<bdi><a href="https://en.wikipedia.org/wiki/en:John_Gerrard_Keulemans" class="extiw" title="w:en:John Gerrard Keulemans"><span title="Dutch bird artist (1842-1912)">John Gerrard Keulemans</span></a>
</bdi>
1889
<a rel="nofollow" class="external text" href="https://archive.org/stream/NauchnyerezulYt2IAka#page/n237/mode/2up">Nauchnye rezulʹtaty puteshestvyǐ N.M. Przhevalʹskago po t͡sentralʹnoǐ Azii, Tom II. Ptit͡sy, Obrabotal Ḟ.D. Pleske</a>