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Western Birds WESTERN BIRDS Vol. 48, No. 2, 2017 Tufted Flycatcher Western Specialty: California Gnatcatcher Photo by © David Pereksta of Ventura, California: California Gnatcatcher (Polioptila californica) California State University Channel Islands, Camarillo, Ventura County, California, 16 August 2009. The site where this photo was taken is the northwesternmost known for the California Gnatcatcher in the 21st century. A few individuals were discovered on campus property in 2009, but the species has not been reliably reported there since the Spring Fire in 2013. Currently, the northernmost population of the California Gnatcatcher is isolated in a narrow band of cactus-rich scrub in Ventura County from Photo by © Jim Ripley of Mesa, Arizona Thousand Oaks northeast to Simi Valley, as described in this issue of Western Birds by Tufted Flycatcher (Mitrephanes phaeocercus) Daniel S. Cooper, Jennifer Mongolo, and Chris Dellith. In this photograph, note the Carr Canyon, Cochise County, Arizona, 6 April 2017.The Tufted Flycatcher occurs bird’s molt: most of the body is still covered in the lacy-textured pale juvenile plumage, mainly in montane forests from northern mainland Mexico south to northwestern but at least the secondary coverts are growing, and the black mark above the eye, Ecuador. In the Sierra Madre Occidental of Sonora it ranges north regularly to at least o indicating a male, has already appeared. about 30 N. Records within the United States comprise four from Texas and several from Arizona. The first three Arizona records were from Lake Mead National Recreation Area (February 2005), the Chiricahua Mountains (May 2008), and Superior (July 2011), as detailed by Gary H. Rosenberg, Kurt Radamaker, and David Vander Pluym in this issue’s report of the Arizona Bird Committee. Since 2015, the species has occurred annually in the Huachuca Mountains, with reports from Miller Canyon, Ramsey Canyon (including a pair nesting in 2015 and 2016), and, as seen in this photo, Carr Canyon in 2017. Volume 48, Number 2, 2017 Arizona Bird Committee Report, 2010–2014 Records Gary H. Rosenberg, Kurt Radamaker, and David Vander Pluym ...74 Age Structure of Adult Brown-headed Cowbirds in Southwest Colorado Joseph C. Ortega and Catherine P. Ortega ...............113 Status of the California Gnatcatcher at the Northern Edge of Its Range Daniel S. Cooper, Jennifer Mongolo, and Chris Dellith .....................................................................124 NOTES First Records of the Asian Rosy-Finch in Alaska and North America Isaac J. Helmericks ...................................................141 First Record of the Eastern Phoebe Breeding in Alaska: Extralimital by 2000 km Bryce W. Robinson, Lucas H. DeCicco, Aaron Bowman, Scott Hauser, and John M. Wright ..................145 Book Review Eugene Hunn .......................................................148 Featured Photo: Peregrine Falcons Attack a Ross’s Gull in Central Coastal California Pete Sole.....................................150 Front cover photo by © William Higgins of Springfield, Virginia: Ap- parently erythristic Short-tailed Hawk (Buteo brachyurus) at Tucson, Arizona, 20 December 2010, returning for a second winter. Since about 2006, the Short-tailed Hawk has become regular in southeastern Arizona, occurring mainly in the mountains, with 24 records endorsed by the Arizona Bird Committee through 2014. Back cover “Featured Photos” by © Donna Pomeroy of El Granada, California (upper), and Pete Sole of Soquel, California (lower): Ross’s Gull (Rhodostethia rosea) near Pillar Point, San Mateo County, Cali- fornia 12–14 January 2017, representing the second record of the spe- cies for California. The Ross’s Gull was attacked by a pair of Peregrine Falcons (Falco peregrinus) hunting cooperatively and carried off. Western Birds solicits papers that are both useful to and understandable by amateur field ornithologists and also contribute significantly to scientific literature. The journal welcomes contributions from both professionals and amateurs. Appropriate topics include distribution, migration, status, identification, geographic variation, conserva- tion, behavior, ecology, population dynamics, habitat requirements, the effects of pollution, and techniques for censusing, sound recording, and photographing birds in the field. Papers of general interest will be considered regardless of their geographic origin, but particularly desired are reports of studies done in or bearing on North America west of the 100th meridian, including Alaska and Hawaii, northwestern Mexico, and the northeastern Pacific Ocean. Send manuscripts to Daniel D. Gibson, P. O. Box 155, Ester, AK 99725; avesalaska@ gmail.com. For matters of style consult the Suggestions to Contributors to Western Birds (at www.westernfieldornithologists.org/docs/journal_guidelines.doc). Good photographs of rare and unusual birds, unaccompanied by an article but with caption including species, date, locality and other pertinent information, are wanted for publication in Western Birds. Submit photos and captions to Photo Editor. Also needed are black and white pen and ink drawings of western birds. Please send these, with captions, to Graphics Manager. Volume 48, Number 2, 2017 ARIZONA BIRD COMMITTEE REPORT, 2010–2014 RECORDS GARY H. ROSENBERG, P. O. Box 91856, Tucson, Arizona, 85752-1856; [email protected] KURT RADAMAKER, 6132 E. Morning Vista Lane, Cave Creek, Arizona, 85331; [email protected] DAVID VANDER PLUYM, 2841 McCulloch Blvd N #1, Lake Havasu City, Arizona, 86403; [email protected] ABSTRACT: In this its eighth report, the Arizona Bird Committee reviews 677 records and updates the Arizona bird list through 2014, adding seven species: the Baikal Teal (Anas formosa), Hawaiian Petrel (Pterodroma sandwichensis), Ivory Gull (Pagophila eburnea), Little Gull (Hydrocoloeus minutus), Rosy-faced Lovebird (Agapornis roseicollis, an introduced species now well established), Sedge Wren (Cis- tothorus platensis), and Common Redpoll (Acanthis flammea). These bring the Arizona state list to 555 species. This is the eighth published report of the Arizona Bird Committee (ABC). It covers records mainly from the period between 2010 and the end of 2014, but also includes some records from prior years that were reviewed recently. Since its last report, the ABC has reviewed a total of 677 records, of which 584 (86%) were accepted. Six native species were added to the state list, the Baikal Teal (Anas formosa), Hawaiian Petrel (Pterodroma sandwichensis), Ivory Gull (Pagophila eburnea), Little Gull (Hydrocoloeus minutus), Sedge Wren (Cistothorus platensis), and Common Redpoll (Acanthis flammea; two records). With the recognition of the establishment of the introduced Rosy-faced Lovebird (Agapornis roseicollis) as well, the Arizona state list now stands at 555 species. Other highlights in this report include acceptance of Arizona’s fifth Trumpeter Swan (Cygnus buccinator), seventh Yellow-billed Loon (Gavia adamsii), second Sooty Shearwater (Ardenna grisea; first found alive), eighth Red-billed Tropicbird (Phaethon aethereus), second Swallow-tailed Kite (Elanoides forficatus; first photographed), third Pacific Golden-Plover (Pluvialis fulva), fourth and fifth Sharp-tailed Sandpipers (Calidris acumi- nata), sixth Buff-breasted Sandpiper (Calidris subruficollis), third through 74 Western Birds 48:74–112, 2017; doi 10.21199/WB48.2.1 ARIZONA BIRD COMMITTEE REPORT, 2010–2014 RECORDS fifth Western Gulls (Larus occidentalis), sixth Arctic Tern (Sterna paradi- saea), third Tufted Flycatcher (Mitrephanes phaeocercus), fourth Yellow- bellied Flycatcher (Empidonax flaviventris), fourth Great Crested Flycatcher (Myiarchus crinitus), fourth Blue-headed Vireo (Vireo solitarius), third and fourth Sinaloa Wrens (Thryophilus sinaloa), second Smith’s Longspur (Calcarius pictus), ninth Fan-tailed Warbler (Basileuterus lachrymosus), and second Gray-crowned Rosy-Finch (Leucosticte tephrocotis). Species of which the number of records is especially notable are the Blue-footed Booby (Sula nebouxii, 4), Brown Booby (Sula leucogaster, 4), Short-tailed Hawk (Buteo brachyurus, 16), Upland Sandpiper (Bartramia longicauda, 3), and Lesser Black-backed Gull (Larus fuscus, 5). We detail the first confirmed nesting in the U.S. of the Nutting’s Flycatcher (Myiarchus nuttingi), The ABC reviews all species new to Arizona, as well as species that have occurred in the state approximately 30 or fewer times. Once a species reaches 30 or more records in the state, it is generally considered regular enough to warrant removal from the review list. Some species, such as the American Golden-Plover (Pluvialis dominica) and Red-eyed Vireo (Vireo olivaceus), are retained on the review list because of their degree of dif- ficulty in identification or confusion with other similar species. The ABC removed the following species from its review list during the period of this report: Cackling Goose (Branta hutchinsii), Red-necked Grebe (Podiceps grisegena), Plain-capped Starthroat (Heliomaster constantii), Red-throated Loon (Gavia stellata), Reddish Egret (Egretta rufescens), Roseate Spoonbill (Platalea ajaja), Red-shouldered Hawk (Buteo lineatus), White-eyed Vireo (Vireo griseus), Winter Wren (Troglodytes hiemalis), Lapland Longspur (Calcarius lapponicus), Worm-eating Warbler (Helmitheros vermivorum), Tennessee Warbler (Oreothlypis peregrina), Magnolia Warbler (Setophaga magnolia), Palm Warbler (S. palmarum), Orchard Oriole (Icterus spurius), and Baltimore Oriole (I. galbula). The current
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