North American Birds

VOLUME 68 NO4 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.

Issue link: http://nab.aba.org/i/605532

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V O L U M E 6 8 ( 2 0 1 5 ) • N U M B E R 4 551 N o r t h e r N C a l i f o r N i a (SDS, JLD); this was our only report. Sonoma's second Yellow-throated Vireo was at Bodega Harbor 4-6 Jun (DN, LHg, ph., v.r. m.ob.). Our only Red-eyed Vireo was a singing male at Wild- er Ranch S.P., Santa Cruz 24 Jun (ph. AMR). A Bank Swallow over California State University, Monterey Bay 1 Jun (DGl) was the only one reported in Monterey during the period. The nearby colony at Fort Ord S.B. might still be ac- tive but was not checked. Other breeding sites in the county are no longer active. Elsewhere, in Mono, the discovery of 160+ birds at a new breeding location at the W. Walker River delta at Topaz Lake 23 Jun (PJM) was welcome news, especially since the historical colony nearby was destroyed several years ago. A Townsend's Soli- taire above Point Lobos 20 Jun (ph. CSc) and another above Bottchers Gap 22 Jun (CRo, LRo) provided the frst Jun records for Monterey. Add- ing to a small number of records for the Region's interior, an apparent Olive-backed Swainson's Thrush was along Hwy. 49 near Bassetts Station, Sierra 12 Jun (†RSTh, LBt). THRASHERS THROUGH ORIOLES In addition to a singing Gray Catbird along De- chambeau Creek, Mono 7 Jun (JGa), catbirds were also at Bodega, Sonoma 8 Jun (DHf) and Año Nuevo S.R., San Mateo 25-26 Jun (JPa, LBt, RSTh). The exact status of Cedar Waxwing as a breeder in the state is uncertain. Birds of- ten linger into Jun, but Jul records are rare, so observations of a single waxwing near Lassen N.P., Tehama 7 Jul (LKh) and at least 3 along Alamitos Creek, Santa Clara 12 Jul (JPa) are in- triguing. Phainopeplas were confrmed breed- ing in two new locations: Redding, Shasta 3 Jun (m.ob.) and Cottonwood Canyon, Mono 6-15 Jun (frst Mono breeding; R&NO, KNN, m.ob.). Additional Phainopeplas on the C.V. foor e. of Lodi 9 Jul and at Acampo 12 Jul (both San Joaquin, DGY) may suggest a pattern of unusual Jul occurrences this season. Seven Ovenbirds included 4 on F.I. (Point Blue) and one inland at the Sacramento Zoo, Sacramento 7 Jun (Lyann Comrack, CCo, ph. Jenner Jung- hans, m.ob.). A Northern Waterthrush contin- ued from spring near Lake Almanor, Plumas through 14 Jun (RDB), and another was at Point Reyes, Marin 2 Jun (PP). We miss Pro- thonotary Warbler most summers, so birds at Point Reyes, Marin 4-6 Jun (RAR, DSg) and June Lake, Mono 5 Jun (RSTh, LBt) represented a good showing. Our only Tennessee Warbler was on F.I. 2-3 Jun (Point Blue). Nine American Redstarts was a typical total, but 4 Northern Parulas was well below our average of 12. Five Magnolia Warblers represented our best sum- mer total since 2000 (8 Magnolias that year). A Bay-breasted Warbler, another species we miss most summers, was at Point Reyes, Marin 4-6 One on the S.F. portion of Alameda Point 23 Jul (JSL) furnished only the third S.F. record. OWLS THROUGH THRUSHES Lake's frst record of Barred Owl was established by a single bird along Elk Mountain Rd. 20 Jul (v.r., ph. JRW, DvW); 2 ads. and 2 juvs. were detected at the same location 25-28 Jul (GEC, SJS et al.), providing the frst breeding record for the county. One or 2 Common Nighthawks that joined a fock of Lesser Nighthawks over a gravel mining area s. of Tracy 3 Jun (DGY) established the second or third record for San Joaquin. An imm. male Allen's Hummingbird that visited feeders in Acampo, San Joaquin 21 Jun (ph., †DGY) provided further evidence of a perhaps regular post-breeding movement through the greater Sacramento/San Joaquin River Delta region. Calliope Hummingbirds seem to slip southward, presumably through their breeding range in the Sierra Nevada, without being detected elsewhere during their southbound migration. The exception, though, is Sacramento, where birds have been reported in "fall" for the past several years. This season, a female or imm. male was spotted at a feeder in North Highlands 20 Jul (Bob Ellis). Any sap- sucker in the C.V. in Jun would be exceptional and perhaps unprecedented. A briefy seen male at Lodi Lake, San Joaquin 1 Jun (DGY) was thought to be either a Red-naped or Yellow-bel- lied. Although one bird was present for much of the period, the pair of Peregrine Falcons that resided on F.I. for several years seems to have abandoned this site after years of failing to pro- duce a fedgling (Point Blue). A pair of Say's Phoebes that nested inside an elaborate wooden playhouse in a residential backyard at the Newell Open Space Preserve 4-27 Jul (MBe, Wendy Schackwitz, m.ob.) provided the frst breeding record for Napa. Although Cassin's Kingbird is unexpected along the immediate coast in the Region at any season, one during the nesting season at Mendoza Ranch at Point Reyes N.S. 11 Jun (Albert Linkowski, Noah Arthur) was espe- cially surprising. Eastern Kingbirds included 2 vagrants—one on F.I. 18 Jul (Point Blue) and another in lower Carmel Valley, Monterey 29 Jul (RC, DR, ph. BHl, ph. Chuck Bancroft)—plus breeders at the traditional site at Blue Lake, Lassen, with a single ad. found 30 Jun (Brent Campos) and 2 ads. at a nest containing one nestling 5 Jul (Michael Park, LKh). A Scissor- tailed Flycatcher at F.I. 10 Jun established the fourth record for the island (Point Blue). A White-eyed Vireo, a singing male, at Oasis Ranch 8-28 Jun (CMc, KNN, ph. Nancy Over- holtz, m.ob.) was Mono's ffth. A Bell's Vireo sang along the Tule River near Lake Success, Tulare near where at least one bird was found in May Although nesting has not been documented ev- ery year, this has been the most frequent nest- ing location for Heermann's Gull in the Region. A huge infux of post-breeding Heermann's Gulls occurred along the immediate coast in late Jun and Jul, though very few juvs. were seen (and these not until mid-Aug), indicating exceptionally low breeding success in Mexico. At F.I., only 3 individual Heermann's were seen. This was far below average, likely due to the paucity of Brown Pelicans, which Heermann's Gulls kleptoparasitize. A number of pairs of California Gulls attempted nesting at F.I., with many birds on nests in late May and early Jun, but the colony failed to fedge any young (Point Blue). Unseasonable Mew Gulls were at Little River S.B., Humboldt 3 Jul (Casey Ryan) and Ocean Beach, S.F. 22 Jul (ph. David Assmann); one at Mono Lake 6 Jun (DS) was not only late but unusually far inland, providing just the third Mono record. Similarly unusual lingerers included single Herring Gulls at Mono Lake, Mono 6 Jun (GWP), at the Mad River estuary 6 Jul (frst Jul record for Humboldt; ph. RbF), and at Clifton Court Forebay, Contra Costa 23 May– 19 Jun (2 birds; ph. Albert Linkowski). Up to 7 ad. Western Gulls at the Koster Rd. gravel pit s. of Tracy, San Joaquin throughout the period (DGY, Terry Ronneberg) appeared to be sum- mering, as some spent nights at the site rather than commuting back and forth from S.F. Bay as has been typical of "coastal" gulls visiting this inland location in the past. A Least Tern at the Chico W.T.P. 2-22 Jul was joined by a second bird 6 & 8 Jul, and copula- tion was observed on the latter date, but nest- ing was not confrmed (ph. MRg, TDM, Matt Forster, m.ob.); this provided Butte's third re- cord of the species. The Region's second Gull- billed Tern, frst found in May, continued through 24 Jun (JSy). A late northbound Black Tern was at H.R.S. 3 Jun (Bob Dunn), whereas a Common Tern at the Adobe Creek outlet at Clear Lake 13 Jun (ph. FHa) furnished Lake's frst summer record. The frst Royal Tern in Monterey Bay since the warm-water decade of the 1980s was a basic ad. or second-year bird at Point Pinos, Monterey 19 Jul (†DR, RC). The in- fux of southern-breeding seabirds apparently included Black Skimmers as well. Mendocino's frst, an ad. at Virgin Creek S.B. 27 Jun (DT, ph. m.ob.), had been banded in 1999 or 2000 at the Salton Sea (fde Charles Collins). Amaz- ingly, 2 different ads. (unbanded) were present at the same location 20 Jul (AGM, ph. m.ob.). Skimmers were recorded at eight locations, well above average, around Monterey Bay in Monterey and Santa Cruz. The number of in- dividuals involved could not be determined, as no occurrence involved more than 4 birds, and some birds may have moved among sites.

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