North American Birds

VOLUME 68 NO2 2015

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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V O L U M E 6 8 ( 2 0 1 5 ) • N U M B E R 2 279 Baja California Peninsula were seen during migratory periods, but the birds most likely wintered at that vast wet- land complex. A Cassin's Auklet at the en- trance to Bahía Magdalena 25 Feb (MO'B) was near the s. limit of the species' range. Christmas Bird Counts revealed unseason- bor 20 Dec–16 Jan (ph. CS et al.). Six each Hooded and Common Mergansers were found in n. Baja California. Horned Grebes were found again in Baja California Sur at the Guerrero Negro salt- works, with at least 3 there 28 Jan–3 Apr (VAP). A Laysan Albatross was off the s. tip of the peninsula at Gorda Bank 26 Feb (MO'B). Coming from opposite directions, North- ern Fulmars and Black-vented Shearwaters were present in good numbers on the nw. coast off Punta Banda 20 Dec, with >1650 fulmars and >24,600 shearwaters present 20 Dec (MJI, GDLG). A single Short-tailed Shearwater was n. of Islas Coronado 18 Jan (ph. TAB). Two Wood Storks remained in the La Paz area throughout the period. Booby numbers remained high on the nw. coast. Maximum counts on Islas Coronado were of 20 Blue-footed Boobies on 1 Feb (DWA) and 85 Brown Boobies (including 2 chicks and 2 downy juvs.) on 26 Jan (MS et al.). A Blue-footed Booby off Punta Banda 20 Dec (†MJI) was the frst for the Ensenada C.B.C. A subad. Nazca Booby was at Cabo San Lu- cas 17 Dec (ph. ADF). American Bitterns continue to be found in trace numbers in the Region. At least one was at Lagunita El Ciprés 17 Jan–17 Feb (EDZH, RAE), and 2 were at Bahía de San Quintín 30 Jan (AEM, JM). An ad. Yellow- crowned Night-Heron at Laguna del Indio in the frst week of Dec (JB, AH, ACF) appears to establish the frst record for the Río Colo- rado delta. In s. Baja California Sur, Swain- son's Hawks were seen n. of Ciudad Insur- gentes 16 Dec (6) and 21 Apr (2) (GJS). The Pronghorn enclosure at Mesa de la Choya on the Vizcaíno Peninsula proved attractive to large raptors. Single Ferruginous Hawks were seen on 8 Dec and 29 Jan and Golden Eagles on 8 Dec (2), 29 Jan, and 26 Feb (all VAP). Ridgway's Rails were found at Estero San José 17 (ph. ME) & 26 Feb (MO'B). There are few previous records there, and it is unknown if the species is resident or nesting. A Sandhill Crane at Bahía de San Quintín 29-30 Jan (JV, ph. JM, AEM) established just the third Regional re- cord since 1982. Eight Mountain Plovers at Laguna Figueroa 3 Dec (DGE) were the only ones found. Seven Stilt Sand- pipers at the Guerrero Negro saltworks 15 Nov and 19 on 1 Apr (VAP) Richard A. Erickson Roberto Carmona Gorgonio Ruiz-Campos –––––––––––––––––––––––––––––––––––––– T his season brought no great surprises, but especially notable were Long- tailed Duck, Sandhill Crane, and He- patic Tanager in Baja California; and Tundra Swan, Louisiana Waterthrush, Virginia's Warbler, and Dickcissel in Baja California Sur. Most records for this report are now gathered through eBird, but observers are still urged to communicate directly with the regional editors, in particular alerting us to patterns and locally important records that might not stand out in what can only be a relatively quick review of many thousands of eBird reports online. GEESE THROUGH TERNS Other than Brant, few geese were found this season. These included 6 Greater White- fronted, one Snow, and one Aleutian Cack- ling in Baja California Sur. Baja California had 9 Greater White-fronted (one a long- staying 10-year-old park-bird in Tijuana), 5 Snow, 2 Ross's (one an 8-year-old Tijuana park-bird), 15 Aleutian Cackling, and 3 Canada (2 Mexicali park-birds)—all of these in the n. quarter of the state. An imm. Tun- dra Swan was found weak on the beach at Cabo San Lucas 14 Nov and later died (ph. GRDR, fde DGE). This was the second in Baja California Sur in four years, while the species has yet to be recorded in the north- ern state this century. Rare ducks included a Wood Duck at the Mexicali zoo 1 Feb–29 Mar (MJB et al.); Eurasian Wigeons at Estero Punta Banda 20 Dec (GM) and Guerrero Ne- gro 14 Apr (ph. MW); and a Baja California Sur Canvasback at the Guerrero Negro salt- works 8 Dec (VAP). Rarer still was the imm. male Long-tailed Duck at the Ensenada har- This immature male Long-tailed Duck at Ensenada harbor, Baja California was enjoyed by many during its nearly month-long stay. This photographer independently found the bird during a cruise ship stop on 21 December 2013. Photograph by Julia Ray. This immature Tundra Swan was decidedly out of place on the beach at Cabo San Lucas, Baja California Sur, photographed on approximately 12 November 2013. Photograph provided by Daniel Galindo Espinosa. Baja California Sur represents the southern end of the winter range for North American Red-throated Loons. This, the frst published photograph for the state, shows a bird at Boca de Solidad (Bahía Magdalena) on 31 January 2014. Photograph by Gerardo Marrón.

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