North American Birds

VOLUME 69 No1 2016

A Quarterly Journal of Ornithological Record Published by the American Birding Association. The mission of the journal is to provide a complete overview of the changing panorama of our continent’s birdlife.

Issue link: http://nab.aba.org/i/629070

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N O R T H A M E R I C A N B I R D S 120 of the fall migration of Lesser Canada Geese, so Oct reports of Cackling Geese are often re - garded with skepticism. However, this season saw 1-5 apparently summering birds into mid- Sep in Adams and Morgan. Stranger still was a Taverner's Cackling Goose at Behrens Reservoir, Weld 13 Aug (SGM, NM). Colorado enjoyed just two reports of Trumpeter Swan, 2 in Boulder 15 Nov (L. Latch, SF) and one in Delta 24 Nov (A. Robinsong). Tundra Swans made an excel - lent showing 14-29 Nov, with reports of 1-7 at 11 sites in nine counties but with a whopping 35 at Elevenmile Reservoir, Park 16 Nov (JK et al.). The Wyoming Tundra Swan migration was strong though brief, spanning 27 Oct–17 Nov, with 19 reports from nine locations involving 1-30 birds, except for an exceptional tally of 100+ at Fontenelle 7 Nov (S. Patla). A Wood Duck, rare in s.-cen. Wyoming, graced Seedskadee N.W.R., Sweetwater 11 Oct (TK). Though usually gone from Wyoming by mid-Oct, there were eight later reports of Wood Ducks from six locations, including a hand - some tally of 18 at Casper 18 Oct (K. Adams) and two Nov reports: 2 at Alcova Dam, Natrona 16 Nov (ZH) and a single at Lander, Fremont 23 Nov (ph. CM). A male Wood Duck at atypi - cally high elevation visited Pitkin 7 Oct (R. Hoffman). Gatherings of 100 Cinnamon Teal at Table Mountain 24 Aug (SB, LM, DE) and at Pathfnder N.W.R., Natrona 14 Sep (TA) provid - ed Wyoming record totals, while 8 on the very late date of 25 Oct at Hutton Lake (B. Steger) was exceptional for a species that is rare by Oct. Late reports of Cinnamon Teal in Colorado came from fve counties 1-10 Oct, but record late were 3 males 15 Nov at Monte Vista N.W.R., Rio Grande (T. Jackman). Mallard hybrids noted (all males) were one with American Wigeon 6 Nov at Cattail Pond, Larimer (SW); one with Mottled Duck 17 Oct in sw. Weld (SGM); and singles with Northern Pintail 21 Sep at Horseshoe Reservoir, Larimer (O. Johnson et al.) and 28 Nov at Behrens Reservoir (SGM). A Colorado record 3500 Green-winged Teal made for a spectacular sight at John Martin Reservoir, Bent 1 Nov (SGM). Greater Scaup were reported from 14 Colorado counties 17 Oct+. A rare migrant in Wyoming, Greater Scaup was represented by two reports: a latilong frst single at Goldeneye Reservoir, Natrona 2 Nov (ZH) and 2 at Twin Buttes Reservoir, Albany 4 Nov (VS). Wyoming's fall scoter migration included rare single Surf Scoters at Ray Lake Marsh, Fremont 19 Oct (EC) and Saratoga Lake, Carbon 20 Oct (SL) and single White-winged Scoters at Seedskadee N.W.R., Sweetwater 26 Oct (TK) and Gray Reef Reservoir, Fremont 16 Nov (ZH, MP). In Colorado, Surf (8 Oct+) and White-winged (28 Oct+) Scoters and Long-tailed Duck (3 Nov+) were noted in ten counties each, while into south-central Wyoming. The end of the sea - son saw little change from the beginning, except that the lower Arkansas fnally escaped the ex - ceptional drought category and was classifed as being in severe drought, along with the rest of the southeastern corner. Wyoming essentially stole the fall show this year, with a good mix of interesting waterbirds and a fantastic landbird migration, scoring a number of rarities, particularly Canada Warbler (Wyoming's ninth), Prothonotary Warbler (eighth), Golden-crowned Sparrow (sixth), and Brambling (third). Colorado birders enjoyed a grand fight of Sabine's Gulls, the state's ninth Costa's Hummingbird, tenth Yellow-bellied Flycatcher, and fourth Eastern Marsh Wren. Abbreviations: Barr (Barr Lake and S.P., Adams); Brett Gray (Brett Gray Ranch, Lincoln); Crow Valley (Crow Valley campground, Pawnee N.G., Weld); E.K.W. (Edness Kimball Wilkins S.P., Natrona, Wyoming); Fontenelle (Fontenelle Dam and Reservoir, Lincoln, WY); Hereford (Wyoming Hereford Ranch, Laramie, WY); Lake Hattie (Lake Hattie Reservoir, Albany, WY); Hutton Lake (Hutton Lake N.W.R., Albany, WY); John Martin (John Martin Reservoir, Bent); Plains (plains of e. Colorado); Table Mountain (Table Mountain Wildlife Habitat Management Area, Goshen, WY); West Slope (w. of the Rockies); Yellowstone (Yellowstone N.P., Park/Teton, WY). Due to re - porting biases, all locations can be assumed to be in Colorado except that each Wyoming location is noted as such the frst time it appears in text. Only those fnding and/or identifying the birds of cited records are identifed here. WATERFOWL THROUGH CRANES Greater White-fronted Geese are rare in fall in Wyoming; this fall's sole report was of two "small focks" migrating near Casper, Natrona 11 Nov (ZH). All of the Colorado Greater White-fronted Goose reports originated from or near the Plains (16 Oct+), where expected. Summering Snow Geese were noted in four Plains counties in Aug. With focks typically arriving in late Sep in Wyoming, early were 1-2 Snow Geese at Table Mountain, Goshen 24-29 Aug (SB, LM, DJ, DE), while seven focks totaling 453 birds fying by a campus window in Laramie, Albany 11 Nov (CP) provided a Wyoming record count. The autumn migratory periods and relative abun - dance of Cackling Geese are not well known in Wyoming. Reports this season spanned 2-29 Nov, involving 1-8 individuals, with core areas in Fremont, Natrona, Laramie, and Albany. The exception to these numbers was a peak count and near-record high count of 170 at Laramie, Albany 12 Nov (SB, CP, DE). In Colorado, Cackling Geese typically being arriving in ear - ly Nov, some two weeks after the beginning Tony Leukering Matt Fraker –––––––––––––––––––––––––––––––––––––– T he western half of both states, plus most of northeastern Colorado, started autumn 2014 with below-average temperatures in August, with the rest of the Region experi - encing average values that month. However, the remainder of the season saw above-average temperatures in both states, with the exceptions of the northeastern quadrant of Wyoming (av - erage) and western Colorado (well above aver- age). September values were quite similar to the September–November averages, but October saw temperatures much above average through - out the Region. November balanced October to some degree, with about half of each state experiencing below-average temperatures; the rest saw a typical November. Most of Wyoming, Colorado's West Slope, and the Republican drain - age in eastern Colorado saw a much-wetter-than- average August, with southeastern Wyoming and north-central Colorado wetter than average; the San Luis Valley was drier than average that month. September saw a mix of values scattered across the Region from near normal to much wetter than average; October's heat was matched with atypical dryness; and November saw a re - bound in most drainages to normal or above- normal precipitation levels, though Wyoming's Big Horn drainage recorded precipitation much above normal and Colorado's Republican drain - age suffered below-normal precipitation totals. All in all, the Region experienced mostly season - ally normal moisture amounts, with a few drain- ages experiencing above-normal precipitation. For a small area along the lower Arkansas River, the season started like so many before it, mired in drought ranked as exceptional. The drought over the southeastern corner of Colorado was listed as severe, while most of the rest of the Region had earlier escaped any drought category, except for the southern edge of Colorado and a fnger extending from Utah Colorado & Wyoming

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