Winter Field Report, December 2015 to February 2016

As has been the trend in recent years, many species are lingering later in fall and even arriving earlier in spring. Along with lingering birds, mid-winter and overwintering records have increased. This winter was phenomenal in this respect, especially in that records were across the board in terms of species, suggesting that water conditions have moderated (more open water) and temperatures in general have also (passerines). Unprecedented records included first wintering White-winged Scoter and first Jan or Feb record of Orange-crowned Warbler. Second or third such records were set by Blue-winged Teal, Surf Scoter, Ruddy Duck, Eared Grebe, Greater Yellowlegs, Rock Wren, and Yellow-rumped (Audubon\u27s) Warbler. Late-lingering species were many, highlighted by record late Red-throated Loon, Pied-billed Grebe, and Least Sandpiper. Other noteworthy laggards were Red-necked Grebe, Double-crested Cormorant, Whooping Crane, Ruby-crowned Kinglet, Hermit Thrush, Rose-breasted Grosbeak, Savannah Sparrow, Lincoln\u27s Sparrow, and Dickcissel, while Eastern Bluebirds set a new CBC high and Yellow-rumped Warblers were present through winter in almost unprecedented numbers (see last winter). Early spring arrivals are usually determined by factors other than local Nebraska environmental conditions, and so are perhaps less variable; nevertheless there were early-arriving Turkey Vulture, American Woodcock, and Franklin\u27s Gull. Perhaps the presence of these numerous winter phenomena allowed other species to winter farther north; there were no Herring Gulls reported 6-27 Jan, only 3 Red Crossbill reports were received, at least one of those of Pacific Coast Type 3 birds, and very few Townsend\u27s Solitaires were counted. Perhaps the only species that was unexpectedly low in numbers given these occurrences was Red-headed Woodpecker, virtually absent from the state, even at its winter stronghold, Indian Cave State Park. Additional significant numbers were a report of 10,000 American Robins, large numbers of Pine Siskins and American Goldfinches, and good numbers again of Yellow-bellied Sapsuckers. Interesting observations included an apparent shift eastward of wintering Brown Creepers, the still-parlous state of Black-billed Magpie in the state, now only in fair numbers in Keith and Scotts Bluff Cos. Eurasian Collared-Doves are abundant in the west, but in the east numbers are far lower, albeit increasing slowly. The third record of Barred Owl in Lincoln Co was of one in a large parking lot in North Platte; it was surmised that all three may have been hit by semis on 1-80 and transported there. As well as all of the winter excitement, there were several rarities detected, including one first state record. Unfortunately, it was Mute Swan, finally added to the state list based on numerous reports that have been difficult to pass off as escapees or released birds. In addition, Nebraska\u27s 7th Black-throated Sparrow appeared at the feeders of the Records Committee Chairman (I think it will be accepted), and there were rare sightings of Barrow\u27s Goldeneye in the east, near adult Kumlien\u27s Gull, Gyrfalcon, Common Raven (they like Applebee\u27s and Burger King), Varied Thrush, and Pine Grosbeak

Presencia y abundancia de aves acuáticas en la Meseta Strobel, Patagonia, Argentina

La meseta Strobel, ubicada en la estepa patagónica, alberga más de 1500 lagunas que son utilizadas regularmente por aves acuáticas, incluyendo una de las principales poblaciones reproductivas del Macá Tobiano (Podiceps gallardoi), una especie endémica de la Patagonia austral. Se registró la presencia y abundancia de aves acuáticas en 41 lagunas, cubriendo el amplio espectro de la variabilidad ambiental de la región. Se llevaron a cabo seis campañas de campo desde fines de primavera a principios de otoño en el período 2004–2006. Se registraron un total de 18 especies de aves acuáticas correspondientes a cinco familias. La familia Anatidae fue la más representada con 12 especies, constituyendo el 85% de las aves acuáticas observadas. La distribución de las aves entre las lagunas fue variable, desde un 2.4% de lagunas ocupadas por el Falaropo Común (Steganopus tricolor) y el Pato Zambullidor Grande (Oxyura jamaicensis) hasta un 80% ocupadas por el Cisne Cuello Negro (Cygnus melanocorypha), y la abundancia varió mucho entre especies y estaciones. El Macá Tobiano, en particular, fue observado en 14 lagunas (1–81 individuos). Seis especies fueron detectadas reproduciéndose en la meseta: el Macá Tobiano, el Macá Plateado (Podiceps occipitalis), el Quetro Volador (Tachyeres patachonicus), el Pato Crestón (Anas specularioides), el Cauquén Común (Chloephaga picta) y la Gallareta Chica (Fulica leucoptera). El Macá Tobiano nidificó en cuatro lagunas, tres de las cuales no habían sido reportadas previamente como sitio de reproducción. Los resultados evidencian la necesidad de generar estudios futuros basados en la dinámica de uso de las lagunas para determinar adecuadamente la importancia de la meseta Strobel como hábitat para la avifauna acuática.The Strobel Plateau is a conspicuous and representative basaltic plateau (“meseta”) in the Patagonian steppe, Argentina. This plateau is dotted with more than 1500 shallow lakes, which are regularly used by waterbirds and support one of the main breeding populations of the near threatened Hooded Grebe (Podiceps gallardoi). We collected data on bird presence and abundance in 41 shallow lakes, covering a wide spectrum of the wetland environmental variability found in the area. We conducted six surveys from spring to fall between 2004 and 2006. We recorded a total of 18 waterbird species, which represent 5 different families. Anatidae was the family most represented with 12 species, accounting for 85% of the observed waterbirds. Waterbird distribution among lakes was variable, from 2.4% occupied lakes for Wilson’s Phalarope (Steganopus tricolor) and Andean Ruddy-Duck (Oxyura jamaicensis) to 80% for Black-necked Swan (Cygnus melanocorypha), and abundance varied greatly both between species and seasons. The Hooded Grebe, in particular, was recorded in 14 lakes (1–81 individuals). Six species were detected breeding in the area: Hooded Grebe, Silvery Grebe (Podiceps occipitalis), Flying Steamer-Duck (Tachyeres patachonicus), Crested Duck (Anas specularioides), Upland Goose (Chloephaga picta), and White-winged Coot (Fulica leucoptera). The Hooded Grebe nested at four lakes, three of them not previously known to hold breeding birds. Results point to the need of further studies on the dynamic nature of waterbird lake use to adequately assess the importance of the Strobel Plateau as waterbird habitat.Fil: Lancelotti, Julio Lucio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Pozzi, Luciana Melina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Marquez, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Wildlife Conservation Society; Estados UnidosFil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentin

Fall Field Report, August–November 2015

To start, a housekeeping item: in the species accounts that follow, whenever I use the term migrant I am referring to fall migration only. Many species, of course, have differing migration strategies and timing in spring and fall. Much of the data used in this report relating to western and Pine Ridge passerines comes from the outstanding banding efforts by Bird Conservancy of the Rockies (formerly Rocky Mountains Bird Observatory) at Chadron State Park (CSP) and Wildcat Hills Nature Center (WHNC) in Scotts Bluff Co. This year’s operators were Josh Lefever and Holly Garrod. Related to the Chadron State Park station, Andrew Pierson made this interesting observation: “I was closely involved with the CSP banding station for all of the years prior to the fires (and the first year after when it was temporarily moved down to the pond area) and it was never a very successful operation. It was always way behind the Wildcat Hills site in terms of numbers and diversity. Now, it seems there are single days when they catch a former season’s worth of birds. Is this directly attributable to the fires and subsequent regeneration of new habitat type and/or quality?” This fall and the previous two falls have been noteworthy for the large number of final sighting dates for many species that are pushing against those species’ latest expected dates. This phenomenon is across the board, both in waterbirds like Blue-winged Teal, Whooping Crane, Willet, and Common Tern, as well as passerines, such as Yellow-bellied Flycatcher (see species account for further discussion), Plumbeous Vireo, Summer Tanager, at least 5 species of sparrows, Rose-breasted Grosbeak, and Lazuli and Indigo Buntings. Conversely, a few winter visitors showed up early, such as “Oregon” and “Pink-sided” Juncos. Surprisingly large numbers of Yellow-bellied Sapsuckers and Philadelphia Vireos appeared, as in previous fall seasons, but unexpected were influxes of Palm Warblers, usually rare in fall, and Black-throated Green Warblers. Each season has its share of noteworthy happenings; this fall , check out the accounts for Osprey, which bred successfully for the first time in Nebraska, Black Rail, a mystery to hopefully be solved next June, a northeasterly nesting of Barn Owl, double-brooded American Kestrel, a tally of 266 Ruby-throated Hummingbirds passing through a Lincoln yard, and two very tardy Baltimore Orioles in Omaha. Rarities this fall were few, but headed by 4th state records of both Black-headed Gull and Black-chinned Hummingbird, the latter, oddly, in far eastern Nebraska. Reports of Cave Swallow and the western subspecies of Nashville Warbler caused struggles with identification criteria, and the presence in the state of the western form of Orange-crowned Warbler was confirmed by the Pine Ridge banding stations mentioned earlier. An update to my note in last year’s Fall Seasonal Report: at that time I mentioned that 18% of the reports I used came from eBird-only contributors. A recheck for this report shows that figure now to be 52%, obviously a significant increase in only one year. I do believe that at some point eBird will largely supersede state and local online groups like NEBirds as the repository and source for Nebraska records as long as the trend of increasing use of eBird continues. However, I believe there still is a need for analysis and comment on the data available, which is probably best done through a Seasonal Report such as this. Finally, some of you may be wondering what my guideline is for including any given species in these accounts, as some do appear some seasons but not in others. I include ALL species that are regular in occurrence for the season at hand; no Northern Shrikes in the Summer Report, for example. I include these regular species whether reported (eBird, NEBIRDS, or personally) or not, as the absence of a regular species is noteworthy. I also include any casual or accidental species that are reported. I believe it is not noteworthy if an unexpected species does not show, so not all casual/accidental species are included in any given season. Thus a casual species such as Gyrfalcon may be reported in one Winter Report but not the next

NOU Spring Field Days and Annual Meeting, Kimball, May 20–22, 2016

The annual meeting of the Nebraska Ornithologists\u27 Union was held at the Kimball Event Center on May 20–22, 2016, and was organized by Robin Harding and Betty Grenon. Although it was a long drive for most, 75 birders attended, including guests from Iowa, South Dakota, Wyoming, Colorado, and Arkansas. On Friday evening, President Dan Leger presented a Michael Forsberg photograph of Burrowing Owls to Betty Grenon in appreciation for her many years of service as Treasurer. The evening program continued with a presentation by Angela Dwyer and Larry Snyder of the Bird Conservancy of the Rockies, formerly known as the Rocky Mountain Bird Observatory. The Bird Conservancy and Nebraska Prairie Partners are responsible for implementing the Mountain Plover nest protection program. They began counting Mountain Plovers in 2001 and later created a nest incentive program with modest payments to landowners who are willing to have plover nests in their agricultural fields marked with stakes to prevent tillage of that area of the field. Approximately 5% of the total population of 12,500 Mountain Plovers nests in Nebraska and the species is listed as Near Threatened by the International Union for Conservation of Nature. The birds often construct two nest scrapes. The female lays a clutch of eggs in one, leaves the male to incubate that one, and then goes on to lay another clutch in the second scrape, which she then incubates. Field trips on Saturday and Sunday morning were led by Kathy DeLara, Bill Flack, Dave Heidt, Wayne Mollhoff, and Don and Janis Paseka. Destinations included Gotte Park in Kimball, Oliver Reservoir, Bushnell, I-80 Exit 1, the Pine Bluffs area in Wyoming, Mountain Plover nests south of Kimball, Golden Eagle nest south of Potter, Hackberry Canyon, Pumpkin Creek, Wildcat Hills State Recreation Area, Scottsbluff sewage lagoons, and Wright\u27s Gap Road. Total species count for the weekend meeting was 156

Caltech-UCSD Birds 200

Caltech-UCSD Birds 200 (CUB-200) is a challenging image dataset annotated with 200 bird species. It was created to enable the study of subordinate categorization, which is not possible with other popular datasets that focus on basic level categories (such as PASCAL VOC, Caltech-101, etc). The images were downloaded from the website Flickr and filtered by workers on Amazon Mechanical Turk. Each image is annotated with a bounding box, a rough bird segmentation, and a set of attribute labels

Fall Field Report, August–November 2016

As usual, there was quite a bit to chew over in the Fall Seasonal Report, although it was generally a pretty uneventful season, especially among waterfowl and shorebirds. The mild fall allowed some good counts to occur, such as the 20+ Surf Scoters, 465 meadowlarks in Garfield Co, and at least 11 White-winged Doves. First State Records are hard to come by; amazing was an Anna\u27s Hummingbird that showed up in the Manning Family\u27s central Omaha yard. How many pass through the yards of non-birders undetected? Always a mind-boggling thought. A 3rd state record Costa\u27s Hummingbird came to light from photos taken in 2010 through a chance conversation with an experienced birder. Almost as exciting was the 5th state record Canyon Wren which settled at a remote central Sandhills Ranch that required a 3.5 mile sand road trek in. Several happy birders made the trip without mishap, however, enjoying the fine hospitality of Mary Sue Shoemaker. And even more: the state\u27s 9th Curve-billed Thrasher was photographed at Chadron State Park near the Bird Conservancy of the Rockies\u27 banding station. Other less exciting but possibly more significant discoveries were a pair of Lewis\u27s Woodpeckers as far east as Keya Paha Co, a 6th fall record of Hooded Warbler, and a first Panhandle record of Blue-winged Warbler, also at the Bird Conservancy of the Rockies\u27 banding station. Notable rare warblers were a Black-throated Blue and a Pine, both in Omaha. Other good counts were the 27+ Sabine\u27s Gulls reported, with 6 in a day at each of 3 locations, 31 Ruby-throated Hummingbirds on a single day in a Lancaster Co yard, reminding me of hummer feeders I\u27ve seen in the west, and 11 Canada Warblers that passed through the east. At the other end of that spectrum were virtually no Pine Siskins, there being only two reports between June and late Nov, and the absence of Red Cross bills away from the Pine Ridge, where they remained in good numbers. Of concern is the continuing scarcity of Black-billed Cuckoos, the absence of Black-billed Magpies this fall east of Harlan Co, and the current low ebb of Gray Partridge populations in the north and east