<p>A male <a href="https://en.wikipedia.org/wiki/Platycryptus_undatus" class="extiw" title="en:Platycryptus undatus">Platycryptus undatus</a>.
</p><p>Although this species can be quite common, they are sometimes difficult to spot on the bark of trees due to their markings.
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The shot above is a crop from a photo taken with my vintage 1960s Pentax Asahi Takumar 50mm f/1.4 prime reversed on extension tubes.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/7539598@N04">Thomas Shahan</a>
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/7539598@N04/4081467571/">Adult Male Platycryptus undatus Jumping Spider (With Video!)</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:Jarry1250" title="User:Jarry1250">Jarry1250</a></li></ul>