« <i>Calliope tschebaiewi</i> » = <i>Calliope pectoralis tschebaiewi</i> (Subspecies of <a href="https://en.wikipedia.org/wiki/White-tailed_Rubythroat" class="extiw" title="en:White-tailed Rubythroat">White-tailed Rubythroat</a>) - adult female and young male
<bdi><a href="https://en.wikipedia.org/wiki/en:Gustav_M%C3%BCtzel" class="extiw" title="w:en:Gustav Mützel"><span title="German artist (1839-1893)">Gustav Mützel</span></a>
</bdi>
<a rel="nofollow" class="external text" href="https://archive.org/stream/NauchnyerezulYt2IAka#page/n89/mode/2up">Nauchnye rezulʹtaty puteshestvyǐ N.M. Przhevalʹskago po t͡sentralʹnoǐ Azii, Tom II. Ptit͡sy, Obrabotal Ḟ.D. Pleske</a>