A Chiffchaff of the subspecies Phylloscopus collybita tristis was only the second confirmed record of this form in Switzerland. For the first time, a prolonged stay of a Long-legged Buzzard Buteo rufinus was observed, concerning one individual that spent at least two weeks in the Alps hunting marmots Marmota marmota. Unusual date records included the first winter record of a Wood Sandpiper Tringa glareola and the earliest recorded dates for Little Bittern Ixobrychus minutus, Eurasian Scops Owl Otus scops, Whinchat Saxicola rubetra, Sedge Warbler Acrocephalus schoenobaenus and Eurasian Golden Oriole Oriolus oriolus. These extraordinary meteorological conditions were the likely cause of what was going to develop into the second-largest influx of Roughlegs Buteo lagopus into our country (mainly in 2011), as well as to the strongest influx of swans and geese in recent years. The beginning of the winter 2010/11 was cold and brought high quantities of snow, especially in Northern Europe and the northern parts of Central Europe. caudatus, which had not previously been recorded with certainty in Switzerland. Late autumn 2010 saw the onset of an invasion of Long-tailed Bushtits of the white-headed northern subspecies Aegithalos c. An additional first record, a Dalmatian Pelican Pelecanus crispus, was placed in category D. ibericus, and Song Sparrow Melospiza melodia, the latter representing the first record of a Nearctic passerine in Switzerland. The highlights of 2010 included no less than five first records for Switzerland: Bonelli's Eagle Aquila fasciata (first and second record), Greenish Warbler Phylloscopus trochiloides, Pallas's Leaf Warbler P. In 2010, the Swiss Rarities Committee examined 421 reports of a total of 105 species, 308 (73 %) of which were accepted and 33 of which refer to past years.
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