North American Birds

VOLUME 69 NO3 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/778845

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N O R T H A M E R I C A N B I R D S 448 C O LO R A D O & W YO M I N G Creek Reservoir and S.P., Arapahoe); Chico (Chico Basin Ranch, El Paso/Pueblo); Crow Valley (Crow Valley campground, Pawnee N.G., Weld); Fontanelle (Fontanelle migrant trap, Sweetwater); Grand Teton (Grand Teton N.P., Teton, Wyoming); Hereford Ranch (Wyoming Hereford Ranch, Laramie, WY); Hutton Lake (Hutton Lake N.W.R., Albany, Wyoming); Melody Tempel (Melody Tempel migrant trap, ne. Bent); Plains (Colorado's e. plains); Seedskadee (Seedskadee N.W.R., Sweetwater, WY); Table Mountain (Table Mountain W.H.M.A., Goshen, WY); Tamarack Ranch (Tamarack Ranch S.W.A., Logan); West Slope (w. of the Rockies spine, Colorado); Wilkins P.P. (Edness K. Wilkins P.P., Natrona, Wyoming); Yellowstone (Yellowstone N.P., Park/Teton, Wyoming). Due to reporting bi - ases, all locations can be assumed to be in Colorado; Wyoming locations are noted as such the first time they appear. Only the observer(s) initially finding and identifying cited records are listed. WATERFOWL THROUGH WOODPECKERS A long-staying Black Brant was at Monte Vista N.W.R., Rio Grande 16 Mar–27 Apr (D. Callahan, m.ob.); Colorado has 33 previous record of the species, 23 of the subspecies, and the San Luis Valley has just one prior record. Wood Ducks were reported three times in late Apr and May from nw. Wyoming, where the species' status is uncertain. A male Mottled Duck was documented at Lake Beckwith, Pueblo 10 Apr (D. Silverman); Colorado has one previous record. Long-tailed Duck is ex - pected in small numbers in e. Colorado both spring and fall (more in fall); up to 3 at a pond in Larimer 3-14 Mar (m.ob.) and a single at Windsor Lake, Weld 11-14 Mar (SGM) fit that bill nicely. However, the species is con - siderably rarer elsewhere in the Region, so the large showing in montane and West Slope Colorado was a surprise, with singles 7-26 Mar at Whitewater, Mesa (R. Lambeth), 9 Mar at Elevenmile Reservoir, Park (D. Suddjian), 14 Mar at Playa Blanca S.W.A., Alamosa (C. Setash), and at very high elevation 5 Apr at Crystal Lake (T. Johnson), providing one of few reports from Lake. Though regular in smallish numbers in e. Colorado in fall (and rarely elsewhere in the Region at that season), records of spring mi - grant Pacific Loons are fairly few. All the more surprising this season is that both reports came from the West Slope, singles at Nucla, Montrose 3-6 Apr (CD, BW) and Highline Reservoir, Mesa 23 Apr (D. & M. Vollmar). Three Red-necked Grebes were a bit more than typical, singles 13 Apr–9 May in Pueblo, Larimer, and Adams (L. Edwards, B. Tilmant, C. Madsen et al.), while a Western Grebe found below Alcova Dam, Natrona 1 Mar (ZH) either overwintered (which they may do here in small numbers; D. Jones, pers. comm.) or was record early for the state by 28 days. Neotropic Cormorant was noted in Colorado for the fifth consecutive year, with an ad. near Windsor, Weld 6 Apr (†SGM). Tagged first-year California Condors made appearances in Colorado. Single birds were s. of Dolores in n. Montezuma 16 Apr (tag N8; F. Carver) and another picked up for rehabilita - tion at Black Forest, El Paso 31 May (tag N1; fide Ellicott Wildlife Rehabilitation Center). An Osprey at Casper, Natrona 13 Mar (S. Mammon) tied Wyoming's record-early date. Common Black Hawk made two Colorado appearances, a juv. at Cottonwood Canyon, Baca 13-14 Apr (ph. M. O'Brien) and an ad. at Pueblo Reservoir, Pueblo 23 Apr (BKP). Even rarer, a Zone-tailed Hawk was at Burlington, Kit Carson 8 Apr (†R. Morris). A late Rough- legged Hawk lingered through 9 May at In Wyoming, this Harlequin Duck with ducklings was photographed at the Prune Creek Campground, Sheridan County on 6 July 2015. This represents the first evidence of breeding for the Big Horn Mountains. Photograph by Beth Payne. Eight Wyoming reports of Fox Sparrow spanned the period 8 April–26 May 2015. At Big Horn, Sheridan County, this Red Fox Sparrow collided with a window 8 April, a very early date. Photograph by Jackie Canterbury. These Northern Flickers at Wyoming Hereford Ranch, Laramie County, Wyoming 28 April 2015 shows some Yellow-shafted features, including yellow rather than reddish tones in flight feathers and traces of red feathering in the nape. Complicating the field identification of apparent intergrade flickers is the recent discovery that Yellow-shafted birds that consume the berries of exotic honeysuckle species (Tartarian and Morrow's) may show pinkish tones rather than yellow in remiges and rectrices, apparently because of the carotenoids contained in the berries. Photograph by Peter Arnold. SA While Glossy Ibis has been removed from the Colorado review list, we continue to en- courage caution in identifying the species, due to the problem of relatively frequent occurrence of hybrids. A report of 265 Plegadis at Red Lion S.W.A., Sedgwick 16 May by ex - perienced observers included 5 Glossy Ibis but no unidentified ibis or hybrids. It is certainly true that Glossy Ibis can be found in nearly every large flock in e. Colorado, but such flocks may also host hybrid individuals. Given typical views of birds in the genus, ruling out hybrids and definitively identifying Glossy Ibis is challenging and often not possible. We appreciate reporting dark ibis to genus only when definitive views and documentation are not possible.

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