<p><strong>Boasting "crazy" evolutionary adaptations, a new group of so-called fanged frogs—cousins of this Luzon fanged frog (file picture)—has been discovered on the <a href="http://travel.nationalgeographic.com/travel/countries/indonesia-guide/">Indonesian</a> island of Sulawesi, according to biologist <a href="http://bio.mcmaster.ca/faculty/evans/evans.htm">Ben Evans</a>.</strong></p><p>During a recent expedition, 13 new "fanged" species were seen on Sulawesi for the first time, 9 of them new to science, according to a new study led by Evans, a biologist at McMaster University in Canada.</p><p>The "fangs" aren't teeth but bony jaw protrusions—some of which aren't visible past the gumline, said Evans, whose study was published in the August issue of the journal <em><a href="http://www.asnamnat.org/amnat">The American Naturalist</a></em>.</p><p>Scientists have yet to discover the fangs' purpose, but one possibility is that the frogs use the spikes to help capture food in fast-moving water. The frogs with the largest fangs seem to prey on fish or tadpoles.</p><p>(See <a href="http://news.nationalgeographic.com/news/2010/11/110107-new-species-vampire-flying-frog-tadpoles-fangs-science-animals/">"'Vampire Flying Frog' Found; Tadpoles Have Black Fangs."</a>)</p><p><em>—Rachel Kaufman</em></p>