1.0Field Station/field-stationField Station/field-stationrich600338<blockquote class="wp-embedded-content" data-secret="Oq3d9tVZcm"><a href="/field-station/bug-of-the-week/anglewings/">Anglewings (Family Nymphalidae)</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="/field-station/bug-of-the-week/anglewings/embed/#?secret=Oq3d9tVZcm" width="600" height="338" title="“Anglewings (Family Nymphalidae)” — Field Station" data-secret="Oq3d9tVZcm" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !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); //# sourceURL=/field-station/wp-includes/js/wp-embed.min.js /* ]]> */ </script> Anglewings are among the last butterflies abroad in fall and the first in spring. Adults spend the winter tucked into spaces called hibernacula—cracks and crevices in rock piles and tree bark or under eaves. Summer and winter adults have somewhat different coloration; the top surface of the hind wing is more uniformly dark in the summer butterflies,