ML646803357

観察結果の詳細

Photos taken thru the kitchen window. 9 degrees F. Blue sky, sunny, calm, and cold. Dryobates pubescens. Downy Woodpecker. D. p. nelsoni Oberholser, 1896. B "NOTES: D. p. glacialis (Grinnell, 1910) is not a definable population, at least within Alaska (whence described). The type and paratypes appear to fall within the variation of Alaska D. p. nelsoni now that a reasonably large series of Alaska birds has been assembled. In SE Alaska, birds with significantly broader tail bands, reduced wing spotting, and a greater tendency for smoky undersides occur, predominantly in fall (Gibson and Withrow 2015). These might be examples of darker, coastal populations to the south (fumidus / gairdnerii) or intergrades between that and paler interior populations to the east (nelsoni / leucurus ). Further work needed." ---- Withrow, J.J., Gibson, D.D. and Winker, K., 2025. Checklist of the avian diversity of Alaska: subspecies, breeding status, and taxonomy. Bulletin of the American Ornithologists Union (1):28