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1.0Animal Facts For Kids | Wild Factshttp://www.wild-facts.comNathanhttp://www.wild-facts.com/author/wildfac1/rich600338<blockquote class="wp-embedded-content" data-secret="MdrFvIXOmu"><a href="http://www.wild-facts.com/2010/wild-fact-898-a-howl-of-a-time-howler-monkey/">Wild Fact #898 – A Howl of a Time – Howler Monkey</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="http://www.wild-facts.com/2010/wild-fact-898-a-howl-of-a-time-howler-monkey/embed/#?secret=MdrFvIXOmu" width="600" height="338" title="“Wild Fact #898 – A Howl of a Time – Howler Monkey” — Animal Facts For Kids | Wild Facts" data-secret="MdrFvIXOmu" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> http://www.wild-facts.com/wp-content/uploads/2010/01/howler-monkey.jpg500332Describes the evolutionary adaptations that allow the howler monkey to produce very loud sounds. As well, discusses the reasons behind this incredible noise. Make sure you check out the sound clip!