{"version":"1.0","provider_name":"For\u00eat.Nature","provider_url":"https:\/\/foretnature.be\/en","author_name":"foretnature","author_url":"https:\/\/foretnature.be\/en\/author\/foretnature\/","title":"Why is the bark of Silver Birch white? - For\u00eat.Nature","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"VSEUBuf65r\"><a href=\"https:\/\/foretnature.be\/en\/forestnews\/why-is-the-bark-of-silver-birch-white\/\">Why is the bark of Silver Birch white?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/foretnature.be\/en\/forestnews\/why-is-the-bark-of-silver-birch-white\/embed\/#?secret=VSEUBuf65r\" width=\"600\" height=\"338\" title=\"&#8220;Why is the bark of Silver Birch white?&#8221; &#8212; For\u00eat.Nature\" data-secret=\"VSEUBuf65r\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>","thumbnail_url":"https:\/\/foretnature.be\/wp-content\/uploads\/2026\/03\/2747.jpg","thumbnail_width":900,"thumbnail_height":600,"description":"The bark of Silver Birch (Betula pendula) has a set of morphological and biochemical characteristics whose functions \u2014 sometimes still debated \u2014 appear to respond to multiple selective pressures. At the structural level, the bark sheds periodically, which is thought to eliminate encrusting parasites and lichens. In doing so, winter sunlight can reach the cork [&hellip;]"}