<p><strong>A new species of night monkey (pictured) is one of eight new mammals found during an expedition to northern <a href="http://travel.nationalgeographic.com/travel/countries/peru-guide/">Peru</a>'s <a href="http://maps.nationalgeographic.com/maps/map-machine#s=r&amp;c=-5.157000725855863,%20-79.27300262451172&amp;z=7">Tabaconas Namballe National Sanctuary (map)</a>, scientists announced recently.</strong></p><p>A team of Mexican and Peruvian biologists found this "new heaven of unknown biodiversity" during a 2009-2011 expedition, according to a press statement.</p><p>Rarely seen and little-studied, night monkeys are listed as vulnerable by the <a href="http://www.iucn.org/">International Union for Conservation of Nature (IUCN)</a> and endangered by the Peruvian government, making the new discovery especially notable.</p><p>The as yet unnamed new species was found close to the border of Ecuador, said expedition co-leader <a href="http://www.ecologia.unam.mx/ie/academicos/ceballos/ceballos_contacto.htm">Gerardo Ceballos</a>, of the National Autonomous University of Mexico. Compared with two other species of night monkey in the region, the new one has a more uniform color and smaller skull.</p><p>(See <a href="http://news.nationalgeographic.com/news/2010/08/photogalleries/100812-new-species-monkey-science-amazon-bearded-pictures/">"Pictures: Bushy-Bearded Titi Monkey Discovered."</a>)</p><p><em></em></p><p><em>—Kate Andries</em></p>