North American Birds

VOLUME 70 NO2 2018

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/1028840

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N O R T H A M E R I C A N B I R D S 236 B A J A C A L I F O R N I A P E N I N S U L A eBird photos of Common Ground-Doves at Estero San José 8 Dec (ph. TP). The surge of Groove-billed Ani reports in the Cape Dis- trict accelerated this season, with up to 14 at Estero San José all period (JEG, ph. VAP et al.), four at Los Frailes 18 Feb (†RL), and singles at Salinas Punta Colorado 6 Dec (ph. C&DL) and La Paz 1 Jan (PH). Short-eared Owls have become scarce in recent years but the Guerrero Negro marshes have been the best place to observe them. Neverthe- less, five at Laguna Guerrero Negro 7 Feb (VAP) was a notable concentration. Burrow- ing Owls also occur in the Guerrero Negro area but are otherwise rare in Baja Californ- nia Sur. Individuals were on the Magdalena Plain 18 Jan (TH), Isla del Carmen 9 Mar (ph. AE, CC), and Loreto 13 Mar (AE, KA). An impressive concentration of aerial in - sectivores at Estero San José 10 Jan included 300 Lesser Nighthawks, 5 Vaux's Swifts, and thousands of swallows (see below) (SGM, NM). It was a banner year for Broad-billed Hummingbirds with 3 in s. Baja California Sur and Baja California's third at Ensenada 1 Feb (ph. OHH et al.). A Yellow-bellied Sap- sucker was at Ensenada 14 Dec (ph. RAH et al.) but more significant were two sapsuck- ers in Baja California Sur: Yellow-bellied at Miraflores 11 Dec (ph. SNGH) and Red- breasted at San Dionisio 27 Feb (ph. GM et al.). Eastern Phoebes were well represented. Two in Baja California Sur were near Loreto 2 Feb (ph. TH) and at Santiago 27 Feb (GM et al.), and the Colorado Desert's first was at Laguna Grande on the Río Colorado 15 Dec (ph. ESM et al.). Another first for the Colorado Desert was the non-calling Tropi- cal Kingbird at the Mexicali zoo 16 Dec (ph. RAE, RMA). Clark's Nutcracker is casual in the Region. Two in the Sierra San Pedro Mártir 11 Dec (FM) were the first seen since Dec 2010. The evening spectacle over Estero San José 10 Jan included 70 Bank Swallows and 3000 Barn Swallows (SGM, NM), record high counts for both species. The only Red- breasted Nuthatch reported was at Maneade- ro 14 Dec (ph. RAE). Two Black-and-white Warblers in the Colorado Desert 15-16 Dec (ph. RAE, RMA et al.) exceeded expectations there, as did 4 Lucy's Warblers in the foothills of the Si- erra de La Laguna 12-13 Jan (ph. SGM, NM) and up to 3 Palm Warblers at Estero San José 10 Dec–28 Feb (ph. BMM et al.). More spectacular were a Prothonotary War- bler at Chapultepec, near Ensenada 13-15 Dec (RMA, ph. EDZH et al.), Hooded War- bler 5 Dec (LDS) and Chestnut-sided War- bler 7 Dec (KBC) in the Sierra de La Laguna foothills northeast of Todos Santos, and a Yellow-throated Warbler at Estero San José 29 Mar (ph. GHR). Black-chinned Sparrow reports are always welcome, as the species' winter distribution in the Region is poorly known. Unfortunately many reports are un- convincing, especially from lowland areas. A convincing report of 3 on the southeast coast came from Punta Gorda, north of La Ventana 1 Jan (GJS). A less enig- matic species in winter, Grasshop - per Sparrow was reported much more widely than usual. Reports came from at least six locations in Baja California Sur and included 8 at Chametla 16 Jan (ph. SGM, GM, NM) and 15 at Todos San- tos 23 Jan (GM, AHÁ). The most unusal sparrows found during the Ensenada C.B.C. 14 Dec in- cluded White-throated Sparrow at Ensenada (RAH), plus Moun- tain White-crowned Sparrow and Slate-colored Dark-eyed Junco on the Maneadero Plain (PAG). Three Summer Tanagers were also found on the Ensenada C.B.C., 3 were at the Mexicali zoo 16 Dec (RMA, RAE), and 5 were in the Cape Dis- trict. The only Rose-breasted Grosbeak seen was at Estero San José 23 Mar (AE). Spring migrant Hooded Orioles have often shown up very early at Bahía de los Ángeles, but at least 2 wintered there this year (GF, MF). Rare orioles in the Cape District included Bullock's and Streak-backed at San Antonio de la Sierra 10 Dec (ph. SNGH), and Balti- more at Caduaño 12 Jan (SGM, NM). Single Purple Finches at Ejido Zarahemla 15 Jan (NAL) and Bahía de San Quintín 1 Apr (JV), plus 8 Pine Siskins at San Antonio de la Sier- ra 14 Jan (SGM, NM) were all south of their expected ranges. Lawrence's Goldfinches were also at Ejido Zarahemla, with an amaz- ing 180 present 15-16 Jan (NAL). Contributors: Ryan M. Abe, Víctor Ayala- Pérez, Nigel Ball, Elia Benítez, Mark J. Bill- ings, José Juan Butrón, Alejandra Calvo Fonseca, Kevin B. Clark, Betsabeel Córdo- va, Morgan Edwards, Richard A. Erickson, George Flicker, Mary Flicker, Peter A. Gaede, Daniel Galindo Espinosa, José Emer García, Mayra L. García, John Gunningham, Mary Gustafson, Tom Haglund, Robert A. Ham- ilton, Adriana Hernández Álvarez, Pablo Herrera, Osvel Hinojosa Huerta, Steve N. G. Howell, Rob Larson, Nick A. Lethaby, Chris and Debbie Llewellyn, Gerardo Mar- rón, Marco Antonio Martínez Damián, Frank Mayer, Buck Mills, Steven G. Mlodinow, Alan Monroy Ojeda, BobMoose Moore, Nick Moore, María Elena Muriel, Rubén Ortega Álvarez, Todd Pepper, Roberto Pineda, Diana Ramírez Sánchez, Gary H. Rosen- berg, Ernesto Salmerón Pillado, Thomas S. Schulenberg, Brad C. Singer, Eduardo Soto Montoya, Lea D. Squires, Gary J. Strachan, Philip Unitt, Jonathan Vargas, Enrique D. Zamora-Hernández. Records submitted to and accessed from aVerAves/eBird were es- sential in the compilation of this report, and additional details on many of these records may be found there. n –––––––––––––––––––––––––––––––––––––– Richard A. Erickson, LSA Associates, 20 Executive Park, Suite 200, Irvine, California 92614 • richard.erickson@lsa-assoc.com Roberto Carmona, Departamento de Biología Marina, Universidad Autónoma de Baja California Sur, Apartado Postal 19-B, La Paz, Baja California Sur, México • beauty@uabcs.mx Gorgonio Ruiz-Campos, Facultad de Ciencias, Universidad Autónoma de Baja California, Km. 103 Carretera Tijuana-Ensenada, Ensenada, Baja California, 22800, México • gruiz@uabc.edu.mx U. S. MAILING ADDRESS: PMB 064, P.O. Box 189003, Coronado, California 92178-9003 Broad-billed Hummingbird was well represented on the Baja California Peninsula this season, but this one at Ensenada 1 February was only the third ever found in Baja California. Photo by © Osvel Hinojosa Huerta. The genetic purity of previous Yellow-bellied Sapsuckers in Baja California Sur has been debated, but this one at Miraflores 11 December 2015 left little to quibble about. Photo by © Steve N. G. Howell.

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