Top left: <a href="https://en.wikipedia.org/wiki/Large-billed_Scrubwren" class="extiw" title="w:Large-billed Scrubwren">Large-billed Scrubwrens</a> (<i>Sericornis magnirostris</i>).
<p>Bottom left: <a href="https://en.wikipedia.org/wiki/Yellow-throated_Scrubwren" class="extiw" title="w:Yellow-throated Scrubwren">Yellow-throated Scrubwrens</a> (<i>Sericornis citreogularis</i>).
</p>
Right: <a href="https://en.wikipedia.org/wiki/White-browed_Scrubwren" class="extiw" title="w:White-browed Scrubwren">White-browed Scrubwrens</a> (<i>Sericornis frontalis humilis</i>) of the Tasmanian race.
<div class="fn value">
<a href="https://en.wikipedia.org/wiki/Neville_William_Cayley" class="extiw" title="w:Neville William Cayley">Neville William Cayley</a> (scanned by <a href="//commons.wikimedia.org/wiki/User:99of9" title="User:99of9">Toby Hudson</a>)</div>
before Cayley's death in 1950
<i>What Bird Is That?</i> by Neville W. Cayley (1984).  First published 1931.