North American Birds

VOLUME 70 NO1 2017

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/936087

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V O L U M E 7 0 ( 2 0 1 7 ) • N U M B E R 1 123 B A J A C A L I F O R N I A P E N I N S U L A beak went unreported, but there was 1 Indigo Bunting in the Cape District and 3 Dickcissels and 2 Bobolinks in Baja Califor- nia, all in October. Continuing a depressing trend, 1 Tricolored Blackbird at El Rosario 17 Oct (RAE) was the only one reported. An icterid expanding its range in the Region, the Great-tailed Grackle is edging into the Cape District. One was at Playa Balandra, north of La Paz, 20 Aug (AHA). One Baltimore and 2 Orchard Orioles were found in Baja Cali- fornia and 5 Orchard Orioles in Baja Cali- fornia Sur included three at Estero San José, a known wintering site. Pine Siskins were found south to Bahía de los Ángeles (at least cies are playing out in the southern part of our Region. Visitors from the north includ- ed Red-breasted Nuthatches at El Rosario 17 Oct (ph. RAH, RAE) and the Sierra de Ulloa, northeast of Ensenada 25 Oct (Huitzil 18: 7-10), a Golden-crowned Kinglet and Townsend's Solitaire at El Salto, near La Mis- ión 31 Oct (EDZH), and an American Robin at Bahía de los Ángeles 25 Nov (GF, MF). A Gray Catbird at Rancho San José de Castro 15 Oct (RAE, RAH) represented the first Re- gional record since 2011. Eight Red-throated Pipits in Baja California in Oct were not ex- ceptional, but five Sprague's Pipits in Baja California 12-17 Oct were (the only previ- ous Regional record—22 Oct 2008—was not photo-documented): 2 at Mesa de San Jacinto and 3 near El Socorro (ph. SNGH, ph. RAE, ph. RAH). During the same period, single Lapland Longspurs were at the same locations and a Chestnut-collared Longspur was near El Socorro. It was another poor season for vagrant warblers. The species total matched the second lowest number this century and the number of individuals was the lowest. Two Tennessee Warblers were found but other- wise there were only single reports of Oven- bird and Lucy's, Chestnut-sided, Blackpoll, Black-throated Blue, and Palm warblers. Most notable were a Hooded Warbler at El Rosario 17 Oct (RAH, RAE, SNGH) and a Yellow-throated Warbler in Ensenada 1 Oct (†JVo). Not quite a vagrant in the Region, as many as 7 Black-and-white Warblers at El Rosario 29 Sep (MJB, RAE, RAH) indicated a stronger presence than usual. Single Vesper and Grasshopper Spar- rows on the Vizcaíno Peninsula 14-15 Oct (SNGH, RAE, RAH) were the only ones re- ported, but appropriate grassland habitat is spotty in the Region and generally poorly covered. A Swamp Sparrow at La Misión 31 Oct (BCS) was also the only one seen. In ad - dition to the free-loading Gray-headed Junco discussed elsewhere, 2 or 3 were found as far south as Cataviña in Oct. Scarlet Tanager and Rose-breasted Gros- Cabo San Lucas at 22 09 63 N, 108 36 36 W 9 Oct (RST, LB). Notable gull observations involved 2 Franklin's Gulls at Lagunas de Chametla 9-16 Nov (GM et al.) and a Heer- mann's Gull far from the coast at Punta Prieta 13 Oct (SNGH, RAE, RAH). DOVES THROUGH MUNIAS Two Spotted Doves on the Río Tijuana 29 Sep (JBM, BRB) were the first found in the Region since Feb 2012. A Groove-billed Ani at Es - tero San José 29 Nov (JEG) was a harbinger of many to come to the Cape District in the following weeks. Similarly, a Broad-billed Hummingbird at Bahía de los Ángeles 11 Oct (ph. GF, MF), establishing only the third Baja California record, preceded four more Re - gional sightings the following winter. In this season that was so disappointing for most traditional vagrants, Philadelphia Vireo and Yellow-green Vireo more than carried their weight. Different Philadelphia Vireos, the first seen in the Region since 2007, were at El Rosario 29 Sep (ph. RAE, ph. RAH, MJB) and 17 Oct (ph. SNGH, RAH) and Yellow-green Vireos were at El Sauzal 28 Sep, El Rosario 29 Sep (ph. RAH, MJB, RAE), and Guerrero Negro 13 Oct (ph. SNGH, RAE). Forty Purple Martins at Isla Partida 8 Aug (AHA) was a notable concentration, but the species has long been associated with the gulf islands of Baja California Sur. It is un- known how widespread declines in the spe- Although the species passes over offshore waters of the Baja California Peninsula by the thousands annually, this adult Arctic Tern at Bahía Todos Santos, Baja California 26 September 2015 was only the second to be photo-documented in the Region. Photo by © Brad C. Singer. Found on the edge of Bahía de San Quintín, Baja California 16 October 2015, this juvenile Sharp-tailed Sandpiper established the first record for Mexico. Photo by © Steve N. G. Howell. There are numerous records for Baja California Sur, but this female Broad-billed Hummingbird at Bahía de los Ángeles 11 October 2015 established just the third record for Baja California. Photo by © George Flicker. Not recorded in the Region since 2007, this Philadelphia Vireo at El Rosario, Baja California, 29 September 2015 was one of two found at that location this season. Photo by © Robert A. Hamilton. This cooperative Sprague's Pipit was one of three near El Socorro, Baja California 16 October 2015. Photo by © Robert A. Hamilton.

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