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.

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Page 161 of 179

N O R T H A M E R I C A N B I R D S 160 Steve N. G. Howell, Corey Lange, Rob Larson, Gerardo Marrón, Robert B. McNab, Luis F. Mendoza, Ricardo Olachea Guzmán, Eduardo Palacios, Miguel Ángel Rodriguez Durán, Kerry Ross, Gorgonio Ruiz-Campos, Rachel Smith, Eduardo Soto Montoyo, Justyn T. Stahl, Gary J. Strachan, Mark Stratton, Rick Taylor, Jona - than Vargas, Enrique D. Zamora-Hernández. Records submitted to and accessed from aVer - Aves/eBird were essential in the compilation of this report. n –––––––––––––––––––––––––––––––––––––– Richard A. Erickson, LSA Associates, 20 Executive Park, Suite 200, Irvine, California 92614, ( Roberto Carmona, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado Postal 19-B, La Paz, Baja California Sur, México, ( Gorgonio Ruiz-Campos, Facultad de Ciencias, Universidad Autónoma de Baja California, Km. 103 Carretera Tijuana-Ensenada, Ensenada, Baja California, 22800, México U. S. MAILING ADDRESS: PMB 064, P.O. Box 189003, Coronado, California 92178-9003, ( 9 Oct (GF, MF). Eight Summer Tanagers were seen in Baja California, 3 in Baja California Sur, and the lone Scarlet Tanager was at El Rosario 8 Oct (MJB, RAE). Other thick-billed migrants of note included a Rose-breasted Grosbeak on the road to San Antonio de la Sierra 9 Nov (ph. JC et al.); a Painted Bunting at Bahía Asunción 20 Oct (ph. SNGH); and Dickcissels at El Rosa - rio 8 Oct (MJB, RAE), Rancho El Descanso 22 Oct (ph. RAE, ph. RAH, ph. SNGH), Santiago 5 Nov (ph. RAE), and La Paz 6 Nov (CL). Responding to a dramatic decline in num - bers, the California Fish and Game Commis- sion in Dec 2014 approved emergency listing of the Tricolored Blackbird under the Califor - nia Endangered Species Act. The species is de facto Endangered in Mexico as well. The only ones reported this season were one at La Salina 6 Oct (RAE) and 20 at El Rosario 8 Oct (MJB, RAE). Rarity of another kind was demonstrated by the Rusty Blackbird at La Misión 1 Nov (ph. EDZH et al.), establishing only the fourth Regional record. In this poor season for eastern vagrants, two oriole species held their own: 4 Orchard Orioles and 2 Baltimore Orioles were found at El Rosario in Oct (MJB, ph. RAE, SNGH), and another Baltimore Oriole was at Rancho San José de Castro 21 Oct (RAH, GM). A good Purple Finch season was on the way, and the frst was at El Rosario 8 Oct (MJB, RAE). The distinctive fight call of a Lawrence's Goldfnch was heard in s. Baja California Sur at Todos Santos 10 Nov (MG et al.), but the bird was not seen. Contributors: Nallely Arce, Víctor Ayala- Pérez, Mark J. Billings, Thomas A. Black - man, Jay Carlisle, Roberto Carmona, Ken Chamberlain, Nadine de Jong, Richard A. Erickson, George Flicker, Mary Flick - er, José Emer García, Kimball L. Garrett, Mary Gustafson, Tom Haglund, Robert A. Hamilton, Adriana Hernández Alvarez, the observers had seen since 1991 on nearly annual autum trips to the n. half of the penin - sula. In Baja California, 3 Red-throated Pipits at Villa Jesús María 19 Oct were at a traditional location, but 2 at a seasonal lagoon s. of Jara - guay 19 Oct and one at Ybarra on Mesa de San Jacinto 18 Oct (all SNGH, RAH, RAE) were at new sites for the species. The warbler season was slightly better than in 2013 but still well below average. Multiples were seen of Tennessee Warbler (5 in Baja Cali - fornia), Lucy's Warbler (Santo Tomás 12 Oct, KC; El Centenario 7 Nov, CL, RAE), and Palm Warbler (one in Baja California, 9 in Baja Cali - fornia Sur), but only singles were seen of some of the other more regular species: Ovenbird (Real del Mar 6 Oct; RAE), Blackburnian War - bler (El Sauzal 7 Oct; MJB, RAE), and Blackpoll Warbler (El Sauzal 17 Oct; SNGH, RAE, RAH). Least expected were a Virginia's Warbler at El Zacatal, near La Paz 29 Nov (†JV), and in cen. Baja California on 23 Oct a Yellow-throated Warbler on the San Quintín Plain and a Black- throated Green Warbler at El Rosario (both ph. RAH, ph. SNGH, RAE). Oregon Junco is a rare visitor to the Viz - caíno Desert; one was at Bahía de los Ángeles B A J A C A L I F O R N I A P E N I N S U L A SA With concern for the endemic Belding's Yellowthroat in the wake of powerful Hur- ricane Odile, we asked Gerardo Marrón to provide the following summary of poten- tial efects on that Endangered species. "Given the geography and infrastructure of Baja California Sur, it is difcult to measure the impact of a hurricane in the state. This is especially true when roads are closed and towns are inaccessible for days or even weeks, as happened with Odile. The hurricane brought great changes in the landscape. Sediment was deposited in some oases, seawater intruded some coastal oases, palm trees were blown down, and emergent vegetation was fattened in many areas, reducing the height of plants like reed and cattail. With these changes there was a reduction of habitat for Belding's Yellowthroat, and a short-term decrease in numbers was observed at traditional oases. However, hurricanes are recurrent in the state, and these en - vironments have the ability to recover quickly, so in most of the oases returned to normal within a matter of weeks. Only where there are constant impacts by humans have conditions not returned to normal, as at Estero San José and La Poza in Todos Santos. As of mid-2015, most oases have recovered, and the number of yellowthroats is normal." This immature male Black-throated Green Warbler at El Rosario 23 October 2014 was the frst to be found in Baja California since 2006. Photograph by Steve N. G. Howell. This Yellow-throated Warbler on the San Quintín Plain 23 October 2014 was the sixth ever found in Baja California but only the third in fall. Photograph by Robert A. Hamilton. This Rusty Blackbird was at La Misión, Baja California 1 November 2014. Like three of the four previous records from the Baja California Peninsula, this one was on the coast within approximately 50 kilometers of the California border. Photograph by Enrique D. Zamora-Hernández.

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