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.

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V O L U M E 6 8 ( 2 0 1 5 ) • N U M B E R 4 469 T h e c h a n g i n g s e a s o n s : o d d d u c k records from the Plains eastward is that so many records are of adults from the Atlan- tic. In the Pacifc, wandering birds north of normal have tended to be juveniles and subadults. Why this difference? Nazca Booby, diffcult to distinguish from Masked Booby in nonadult plumag- es, has been predicted to be added to the avifauna of the United States ever since the two were split by the American Orni- thologists' Union in 2000. One Nazca was noted 1 July off Coiba Island, Panama, and one at last made it north to California, a nice adult off the Palos Verdes Peninsula 27 July—virtually certain to be accepted as the state's frst. A few Blue-footed Boo- bies were detailed from Costa Rica, where not unexpected, but nothing like the au- tumn 2013 fight occurred in summer 2014. A species that surely has never been mentioned in these pages, an ailing Peru - vian Booby was in Panama City—where the species is a vagrant—22 June. As an El Niño/Southern Oscillation event began completely shocked by 50 that summered in the mountains of Buncombe County, North Carolina, south of Asheville. Again: are these young non-breeding birds? They certainly cannot be post-breeding birds, and it seems unlikely that they're failed breeders. Could drought conditions over parts of the breeding range encourage pel- icans to summer in the tropics? Boobies are the new pelicans, and most species were in the news in summer 2014. In Nebraska, a Brown Booby in Sarpy County from at least 28 June through 1 July (Figure 7) was likely "overfow" from Tex- as, where their occurrence "has changed dramatically in recent years," according to regional editors Mark Lockwood, Eric Carpenter, and Randy Pinkston. Eight to- gether at Corpus Christi 31 July boggles the mind, with a few others on the coast later for good measure. After records from Atlantic Canada and the Great Lakes in recent years, Great Plains records might seem mild, but what shocks about recent One wonders whether Florida nesters are responsible for some of the records in states farther north on the Atlantic coast, such as New Jersey's frst in Hunterdon County this year, or Maryland's fourth on 22 July and later at Violette's Lock (where two have been found in the past). We rarely mention the old standby Double-crested Cormorant in this col - umn. Nostra culpa. They are making northward movements as well. Up to four, maybe more, made it to Nome, Alaska, through mid-June, and others made it to St. Paul and St. George Islands in the Pribilofs, where rare. We have, of course, frequently mentioned Brown Pelicans, whose recent wanderings in the conti - nent's interior have made us wonder how many birds are from the Pacifc and how many from the Atlantic. And American White Pelicans have made our heads spin for more than two decades now; their lat- est coup was staged in Honduras, where 151 decided to summer. We are no longer Figure 5. This Red-necked Grebe was one of a pair present at Lake John, Jackson County, Colorado 30 May through 31 July 2014 (here 17 June) that provided not just Colorado's third summer record of the species but also its frst nesting record. The nest shown here was the third of three nests built, all of which were unsuccessful. Photograph by Chuck Hundertmark.

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