Males of
<ol><li>Greenish Warbler, <i><a href="//commons.wikimedia.org/wiki/Phylloscopus_trochiloides" title="Phylloscopus trochiloides">Phylloscopus trochiloides</a></i> (Sundevall 1837) (syn. <i>Phylloscopus viridanus</i> Blyth.)</li>
<li>Green Leaf-Warbler, <i><a href="//commons.wikimedia.org/w/index.php?title=Phylloscopus_nitidus&amp;action=edit&amp;redlink=1" class="new" title="Phylloscopus nitidus (page does not exist)">Phylloscopus nitidus</a></i> Blyth 1843</li>
<li>Arctic Warbler, <i><a href="//commons.wikimedia.org/wiki/Phylloscopus_borealis" title="Phylloscopus borealis">Phylloscopus borealis</a></i> (Blasius 1858)</li></ol>
<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>
<a rel="nofollow" class="external text" href="https://archive.org/details/Naumann2Naum">Naumann, Naturgeschichte der Vögel Mitteleuropas</a> (1897) <a rel="nofollow" class="external autonumber" href="https://archive.org/stream/Naumann2Naum#page/130/mode/2up">[1]</a>