Recording of Juvenile Swamp Sparrow Song. For comparison between bird and mouse songs. Courtesy of Peter Marler.
Holy T, Guo Z
CC BY 2.5
Audio S5 from <cite style="font-style:normal">Holy T, Guo Z. "<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1275525">Ultrasonic Songs of Male Mice</a>". <i>PLOS Biology</i>. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1371/journal.pbio.0030386">10.1371/journal.pbio.0030386</a>. <a href="https://en.wikipedia.org/wiki/PMID" class="extiw" title="w:PMID">PMID</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/16248680">16248680</a>. <a href="https://en.wikipedia.org/wiki/PubMed_Central" class="extiw" title="w:PubMed Central">PMC</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1275525">1275525</a>.</cite>