Calling male.  Photograph taken in the wild at night.
<a href="https://en.wikipedia.org/wiki/User:Brian.gratwicke" class="extiw" title="w:User:Brian.gratwicke">User:Brian.gratwicke</a> (<a rel="nofollow" class="external text" href="https://www.flickr.com/people/19731486@N07">Brian Gratwicke</a> at Flickr)
CC BY 2.0
<p><a rel="nofollow" class="external text" href="https://www.flickr.com/photos/19731486@N07/4567965511/">Dendropsophus microcephalus - calling male (Cope, 1886)</a>
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<ul><li>Uploaded by <a href="//commons.wikimedia.org/wiki/User:99of9" title="User:99of9">99of9</a></li></ul>