{"id":19357,"date":"2013-10-18T06:33:00","date_gmt":"2013-10-18T12:33:00","guid":{"rendered":"http:\/\/www.featheredphotography.com\/blog\/?p=19357"},"modified":"2013-10-18T06:33:00","modified_gmt":"2013-10-18T12:33:00","slug":"birds-wearing-to-dark-some-visual-evidence-as-to-why","status":"publish","type":"post","link":"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/","title":{"rendered":"Birds &#8220;Wearing To Dark&#8221; &#8211; Some Visual Evidence As To Why"},"content":{"rendered":"<p>This past summer\u00a0I posted these first two Loggerhead Shrike images as evidence that the ventral colors of the species change from white to almost black as the summer wears on and asked my readers\u00a0why this occurs.\u00a0 Several responded with a logical explanation.<\/p>\n<p>Three days ago I photographed a Horned Lark that may demonstrate that\u00a0those readers were right.<\/p>\n<p>I&#8217;m re-posting the first two images to bring everyone up to speed.<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"19361\" data-permalink=\"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/loggerhead-shrike-6369-ron-dudley-3\/\" data-orig-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley.jpg\" data-orig-size=\"731,900\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;7.1&quot;,&quot;credit&quot;:&quot;RON DUDLEY&quot;,&quot;camera&quot;:&quot;Canon EOS 7D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1366961373&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;700&quot;,&quot;iso&quot;:&quot;640&quot;,&quot;shutter_speed&quot;:&quot;0.000625&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"loggerhead shrike 6369 ron dudley\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley.jpg\" class=\"aligncenter size-full wp-image-19361\" alt=\"loggerhead shrike 6369 ron dudley\" src=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley.jpg\" width=\"731\" height=\"900\" srcset=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley.jpg 731w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley-243x300.jpg 243w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley-121x150.jpg 121w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-6369-ron-dudley-400x492.jpg 400w\" sizes=\"auto, (max-width: 731px) 100vw, 731px\" \/><\/a><\/p>\n<p>For most of the year the breast and belly of the Loggerhead Shrike is white but&#8230;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"19360\" data-permalink=\"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/loggerhead-shrike-0712-ron-dudley-2\/\" data-orig-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley.jpg\" data-orig-size=\"900,642\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;6.3&quot;,&quot;credit&quot;:&quot;RON DUDLEY&quot;,&quot;camera&quot;:&quot;Canon EOS 7D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1372835134&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;500&quot;,&quot;iso&quot;:&quot;640&quot;,&quot;shutter_speed&quot;:&quot;0.0004&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"loggerhead shrike 0712 ron dudley\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley.jpg\" class=\"aligncenter size-full wp-image-19360\" alt=\"loggerhead shrike 0712 ron dudley\" src=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley.jpg\" width=\"900\" height=\"642\" srcset=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley.jpg 900w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley-300x214.jpg 300w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley-150x107.jpg 150w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/loggerhead-shrike-0712-ron-dudley-400x285.jpg 400w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/p>\n<p>but by mid-summer those whites turn much darker, almost black in some places.\u00a0 The reason for this rather dramatic color change really puzzled me but Brian Gatlin and Bryce Robinson provided the explanation.\u00a0 I&#8217;ll quote Brian who said:<\/p>\n<ul>\n<li>&#8220;<em>a combination of wear and\/or absence of feathers is creating gaps in the plumage, exposing the darker bases of the feathers that we don\u2019t usually see. If you pick up body feathers off the ground, you\u2019ll often notice that the color that you see on the bird is usually limited to the feather tip, with a darker base<\/em>.&#8221;<\/li>\n<\/ul>\n<p>As Bryce mentioned in his comment, when feathers wear to expose the darker feather bases it is sometimes called &#8220;wearing to dark&#8221;.<\/p>\n<p>All this seemed logical to me but it&#8217;s one thing to read the words and quite another to actually see evidence of it in the field.\u00a0 That evidence was provided three days ago by a completely different species &#8211; a Horned Lark.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"19364\" data-permalink=\"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/horned-lark-1890-ron-dudley\/\" data-orig-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley.jpg\" data-orig-size=\"900,679\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;7.1&quot;,&quot;credit&quot;:&quot;RON DUDLEY&quot;,&quot;camera&quot;:&quot;Canon EOS 7D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1381827083&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;700&quot;,&quot;iso&quot;:&quot;640&quot;,&quot;shutter_speed&quot;:&quot;0.0015625&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"horned lark 1890 ron dudley\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley.jpg\" class=\"aligncenter size-full wp-image-19364\" alt=\"horned lark 1890 ron dudley\" src=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley.jpg\" width=\"900\" height=\"679\" srcset=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley.jpg 900w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley-300x226.jpg 300w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley-150x113.jpg 150w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1890-ron-dudley-400x301.jpg 400w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/p>\n<p>This time of year I&#8217;m not sure if this Horned Lark is a juvenile or an adult female but either way it was posing on a rock in marginal light and I took some shots of it.\u00a0 Notice the typical colors of the belly and breast.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"19359\" data-permalink=\"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/horned-lark-1883-ron-dudley\/\" data-orig-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg\" data-orig-size=\"900,646\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;7.1&quot;,&quot;credit&quot;:&quot;RON DUDLEY&quot;,&quot;camera&quot;:&quot;Canon EOS 7D&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1381827081&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;700&quot;,&quot;iso&quot;:&quot;640&quot;,&quot;shutter_speed&quot;:&quot;0.0015625&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"horned lark 1883 ron dudley\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg\" class=\"aligncenter size-full wp-image-19359\" alt=\"horned lark 1883 ron dudley\" src=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg\" width=\"900\" height=\"646\" srcset=\"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg 900w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley-300x215.jpg 300w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley-150x107.jpg 150w, https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley-400x287.jpg 400w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/p>\n<p>But when a sudden breeze came up, voila! &#8211; the dark feather bases were exposed.\u00a0 It now made even more sense to me that (in some species) when the lighter colored feather tips are worn it can expose their darker bases and change the color that we see.<\/p>\n<p>I&#8217;m sure there are many variables involved in different species.\u00a0 For example, I haven&#8217;t seen any Horned Larks with almost black bellies and breasts but perhaps that&#8217;s because the white feather ends are longer than those in shrikes so they never wear far enough to expose the darker colors (pure speculation on my part).<\/p>\n<p>Like many folks I&#8217;m a visual learner so actually seeing these dark feather bases on a living bird (rather than on a\u00a0discarded feather) made an impression on me and I thought it was worth sharing.<\/p>\n<p>Thanks Brian and Bryce!<\/p>\n<p>Ron<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This past summer I posted these first two Loggerhead Shrike images as evidence that the ventral colors of the species change from white to almost black as the summer wears on and asked my readers why this occurs.  Several responded with a logical explanation.<\/p>\n<p>Three days ago I photographed a Horned Lark that may demonstrate that those readers were right.<\/p>\n<p> <a class=\"continue-reading-link\" href=\"https:\/\/featheredphotography.com\/blog\/2013\/10\/18\/birds-wearing-to-dark-some-visual-evidence-as-to-why\/\"><span>Continue reading<\/span><i class=\"crycon-right-dir\"><\/i><\/a> <\/p>\n","protected":false},"author":2,"featured_media":19359,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[3,334,354,346],"tags":[124,174,409,206,1696,1697,1699,1698],"class_list":["post-19357","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-antelope-island","category-birds","category-horned-larks","category-loggerhead-shrikes-shrikes-and-vireos","tag-eremophila-alpestris","tag-horned-lark","tag-lanius-ludovicianus","tag-loggerhead-shrike","tag-plumage-color-change","tag-wear","tag-wearing-to-dark","tag-worn"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/featheredphotography.com\/blog\/wp-content\/uploads\/2013\/10\/horned-lark-1883-ron-dudley.jpg","jetpack_shortlink":"https:\/\/wp.me\/p1zzJh-52d","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/posts\/19357","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/comments?post=19357"}],"version-history":[{"count":0,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/posts\/19357\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/media\/19359"}],"wp:attachment":[{"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/media?parent=19357"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/categories?post=19357"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/featheredphotography.com\/blog\/wp-json\/wp\/v2\/tags?post=19357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}