ML468445581
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- Imaturo, Sexo desconhecido - 1
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Notas sobre o média
Very poor recording of the faint, mimic-like song of the Redwing with RBNU and BCCH
Detalhes da observação
Continuing 2nd state record, and the 2nd in Maine this month! Found here yesterday by Brendan McKay. Part of a major irruption into the Northeast this month; with one other Maine sighting, one in New Brunswick, and three in Newfoundland! Foraging on rose berries, at first with robins and then alone, in brush and multiflora rose patch at 43.6672818, -70.3070179 in the center of the park. Present in same small area throughout the time we spent at the park. The Redwing would rest hidden low in the brush and then occasionally climb higher into the tangle to eat berries but was always partially obscurred. Very similar to American Robin but appeared shorter-tailed and its posture was more squat and dumpy; with white belly and brown streaks throughout undersides; flanks and underwings dull reddish; streaked throat and bold stripes on face with particularly buffy supercilium. The undertail coverts were ~50% marked with brown. Legs pinkish, feet blackish. Pointed tail feathers, white tips to tertials, and buffy outer greater coverts all confirm this as an immature (second-year) bird. Concerning subspecies; it isn't totally convincing that the two are actually reliably separated in the field but the heavy, dark streaking on the body and the heavily-marked undertail coverts may be in favor of Icelandic/coburni. Additional input concerning the subspecies ID: Icelandic biologist Yann Kolbeinsson suggested: "To me there is little doubt, this has to be a coburni. Bulky looking bird with darkish legs, heavy streaking on breast (not in the heavier end) but more importantly brown base/streaking down alongside the flanks beyond where the red stops. The streaks also being more arrow/droplet shaped than actual streaks. First-winter bird." And Louis Bevier suggests: "I think the bright sunlight on some of the days folks were watching the bird perhaps made the legs look brighter, but in neutral light (like on that log eating snow out of bright sun), the tarsus and toe color were clearly not the bright, bubble-gum pink of nominate iliacus, and the toes especially are dark brown. One thing I have noticed is that if you look at the individual feathers along the flank, they show a dark center along the rachis and then broad brown borders the create the blurry streaking pattern. This is very different from most iliacus, which have those markings quite discrete, thin, and in a whitish background, like the markings on the lower flanks of this fall immature in Germany (https://macaulaylibrary.org/asset/63575461). The streaks on the flanks of the Portland bird coalesce down flanks and extend posteriorly beyond where the red patch ends. I still think the pattern on the under tail coverts is like coburni with most of those feathers broadly dark centered, something rarely (or not all?) shown by nominate iliacus. It makes some sense for the bird to be coburni, which I think are what have been colonizing Greenland since the 1990s, when Redwing became more regular to Newfoundland (and Fieldfares dropped off somewhat). There are definitely some records of Redwing in Newfoundland that look like nominate iliacus, but they predominantly see Icelandic birds now (or birds showing characters of coburni, wherever they are from). If you look at the birds that have been in Washington and British Columbia, you can see a dramatic difference in underparts pattern. I don't know if there is a cline across Eurasia within what is classified as nominate iliacus, but those do seem to look whiter and more sharply and sparsely marked below."
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