Signs of seasonal turnover were evident on Mt. Mansfield this week, as VCE hit the two-month mark in our 25th consecutive year of studying the ridgeline’s breeding birds. Free-flying juveniles, molting adults and non-local dispersers are beginning to supplant the resident breeders in our mist nets. Hoping to dodge predicted thunderstorms, Jason Hill, Susan Hindinger, Grace Mitchum, Amber Wolf and I arrived early Wednesday evening. Temperatures were as warm as they ever get at 3900′ elevation, with the mercury reading 73 degrees F and the air decidedly muggy, but just short of stifling, thanks to a steady 10-15 mph west wind. We set our usual array of 25 mist nets, took in a fine sunset, and were grateful the t’storms passed north. By nightfall we had captured 10 birds, including the season’s first juvenile Bicknell’s Thrush (BITH) and Dark-eyed Junco. The dusk chorus was surprisingly robust, as BITH called and sang with gusto, complemented by the more subdued songs of Swainson’s Thrush and the sweet refrains of White-throated Sparrows. Clouds lowered onto the ridgeline overnight, but temperatures remained relatively balmy (61F at 4 am). Dawn emerged slowly as we began opening nets at 0415, but the sluggish avian activity picked up markedly as a rising sun worked to dispel the sweeping clouds. Banding was steady, and we accumulated 60 captures by the time nets were down in early afternoon. Blackpoll Warblers topped the numeric chart, with 17 individuals netted, including 5 new males, 5 new females, 2 juveniles, and 3 males from previous years. Surprisingly, none of us heard a single song all day, evidence that local adults are busy tending their young. Of the 11 adult Blackpolls we examined carefully for signs of flight feather molt, 8 had dropped their innermost primaries, signaling the imminent end of breeding activities and a switch to preparation for the long-distance southward migration <http://vtecostudies.org/blog/the-blackpoll-warblers-daring-ocean-migration/>. We captured several adults of other species in active primary molt, including a Black-throated Blue Warbler. As always at this time of year, our nets yielded a few surprises. Foremost among them was an adult female Least Flycatcher, the first of this species we have captured on the ridgeline in 25 years, including the autumns of 1995-97, when we conducted a fall migration banding study <http://www.bioone.org/doi/abs/10.1676/0043-5643%282000%29112%5B0124:MSAPDA%5D2.0.CO%3B2>. Obligingly, this bird was netted with a Yellow-bellied Flycatcher, providing a rare opportunity to simultaneously examine these two similar species. Other captures of non-local birds included a single adult female Downy Woodpecker and Blackburnian Warbler, and two adult Black-throated Blue Warblers. While it may not feel like summer is on the wane —and certainly no one wants to hear it — the birds are telling us that changes are in store. Banding totals: Downy Woodpecker 1 adult female in mid-primary molt Yellow-bellied Flycatcher 1 adult Least Flycatcher 1 adult female w/regressing brood patch Red-breasted Nuthatch 1 juvenile Bicknell's Thrush 8 (3 new adults, 2 juveniles, 3 within-season recaptures) Swainson's Thrush 6 (1 new male, 1 return male, 4 within-season recaptures) American Robin 2 free-flying juveniles Magnolia Warbler 1 adult female Blackburnian Warbler 1 adult female Blackpoll Warbler 17 (10 new adults, 2 juveniles, 3 return males, 2 within-season recaptures) Black-throated Blue Warbler 2 (adult male and female) Yellow-rumped Warbler (Myrtle) 7 (4 new adults, 1 juvenile, 2 within-season recaptures) Dark-eyed Junco (Slate-colored) 8 (4 new adults, 1 recently-fledged juvenile, 3 within-season recaptures) White-throated Sparrow 5 (1 new female, 1 juvenile, 3 within-season recaptures) To see Chuck Gangas's great photos of some of these birds, check out the VCE blog at http://vtecostudies.org/blog/seasonal-changes-in-evidence-on-mt-mansfield/ ________________________ Chris Rimmer Vermont Center for Ecostudies PO Box 420 | Norwich, Vermont 05055 802.649.1431 x1 http://vtecostudies.org/ <http://vtecostudies.org/> To post messages, send e-mail to: [log in to unmask] Set your e-mail application to PLAIN TEXT ONLY to post messages. To contact the list owner: [log in to unmask] To unsubscribe: E-mail this command to [log in to unmask]: UNSUBSCRIBE UV-Birders To change your e-mail address: E-mail this command from your old address to: [log in to unmask]: CHANGE UV-Birders [new e-mail address] Web based archives and subscription management are available at: http://listserv.dartmouth.edu/Archives/uv-birders.html