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/* color: #222; */ border-top-left-radius: 1px; This is captured with a Nikon D90 and an Nikkor 70-300mm AF-S VR ED telephoto zoom.
display: none; margin: 0; display: block; position: absolute; are affected? margin-top: -1px !important; bird DOES produce the pigments responsible for the yellow bill Albinism is caused by a genetic mutation causing an absence of tyrosinase in pigment cells. padding-left: 20px; I was grateful for any chance to capture an image, though. ul.social li { nav#block-mainnavigation > ul > li > a { Sunlight & Seasons #block-jnorth-branding a img { BTO doesn't currently contact supporters by telephone for promotional reasons. margin-top: -5px; } gcse.type = 'text/javascript';
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#block-jnorth-branding { z-index: 9; } You can unsubscribe at any time. A leucistic robin arrived today with a flock of fellow American robins.
nav.block-project > ul > li {
nav#block-robin > ul > li, nav#block-monarch > ul > li > a, nav#block-monarch, Leucistic birds show a variable amount of white or pale in the plumage. clear: both; } margin-bottom: 10px; } }
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Tulip Test Gardens width: 100%; } This results in a white feathers, unless the normal plumage colour also comprises carotenoids (e.g.
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})(); border-bottom-right-radius: 1px; } Sometimes the animal is faded rather than spotted. .nav-embed,
div.block-projecttitle { What parts of the robin's coloration are affected? width: 100%; nav#block-tulip, What parts of the robin's coloration
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Kids, Robins of A Different Feather
var cx = '001362106099760246556:kl-z1sbpxrs'; In dilution, melanin cells are present (unlike in leucistic birds) but produce less pigment than normal. nav#block-robin > ul > li:nth-of-type(1), #block-jnorth-footer { nav#block-robin > ul > li > a, nav#block-hummingbird > ul > li > a,
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This leads to a good diagnostic feature with which to distinguish leucistic and albino individuals – the colour of the eye. .jnorth-footer p {
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margin-bottom: 20px; } In the robin pictured here, the … color: #0074d9; } width: 1px; padding: 0; This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
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position: absolute; Leucistic animals have a partial deficiency in melanin production or distribution. nav.block-project > ul > li > a { The flock of robins were scouring the leaf litter for invertebrates on this cold day with temperatures hovering around 32 degrees F. Robins eat fruit in the winter; it’s comical how a switch seems to flip in March suddenly switching them back to carnivores, no matter the conditions. nav#block-sunlightseasons > ul, font-size: .875em; nav#block-tulip > ul, #googlesearchform { nav#block-tulip > ul > li > a, nav * { div#block-sunlightseasonstitle #project-menu-toggle, font-family: 'cabinregular', sans-serif; height: 96px; The Leucistic Pigment Condition. transition: all .25s; } Indeed, in this flock of robins I saw a red-shouldered hawk try its luck. background-position: cover; clip: rect(0 0 0 0); nav#block-mainnavigation a { Here, plumage colour often appears ‘washed out’ (i.e. This results in a white feathers, unless the normal plumage colour also comprises carotenoids (e.g. Albinos have pink eyes while the iris pigmentation of leucistic birds remains dark. width: 240px; } BTO currently promotes two appeals a year, and occasionally offers membership opportunities to non-members. nav#block-tulip > ul > li,
An albino individual is unable to produce melanin pigments.
right: 0;
#block-jnorth-footer > ul li a { .nav-embed header { overflow: hidden; display: block; All Species & Projects Livecam nav#block-mainnavigation > ul > li > a { They are the most common raptor in North America. .jnorth-footer-learner-logo, margin-left: auto; Leucistic animals have a partial deficiency in melanin production or distribution. nav#block-monarch > ul > li > a, background: url("/themes/custom/jnorth/img/icon-pinterest.svg") no-repeat; nav#block-mainnavigation #main-menu-toggle { robin. line-height: 1.5em; bottom: 0; nav#block-mainnavigation > ul > li > ul.l1 > li { margin-bottom: 20px; }
padding-right: 20px; -webkit-font-smoothing: antialiased; Pinterest nav#block-tulip, This is one reason we know it is not a true albino of a Different Feather: Albinism, Who is that Masked Robin: Partial Albinism. Leucism is not a helpful trait; such animals tend to stand out to predators, making them easier prey. color: #0074d9; } list-style: none;
width: 220px; } .jnorth-footer-uw-logo img { font-size: .875em; height: auto; Most albino birds die soon after fledging, primarily as a consequence of their poor eyesight, and albino birds are not thought to progress to adulthood in the wild.
Robins text-align: left; #block-jnorth-branding > p {
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background: white; width: 24px; } It could be a bird of any species. Notice: The leucistic robin does have a reddish breast. nav.block-project { I had very few chances to photograph him in the minute or so he was in view.
height: 40px; Anecdotally, I’ve seen leucism before in robins, more often than other species. border-bottom-right-radius: 0px; font-size: .875em; nav#block-mainnavigation > ul {
‘Dilution’ is another condition that we have grouped under the category ‘leucism’ in our Abnormal Plumage Survey. nav#block-mainnavigation #main-menu-toggle > span { Leucistic robin Occasionally a bird doesn't produce some pigments.
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