Report on scarce migrant birds in Britain in 2002, Part 2: American Wigeon to Ring-billed Gull

Report on scarce migrant birds in Britain in 2002, Part 2: American Wigeon to Ring-billed Gull

This is the second part of this eighth annual report, which discusses the remaining nonpasserine species, from American Wigeon Anas americana to Ring-billed Gull Larus delawarensis. Part 1 of the report, which covered European Bee-eater Merops apiaster to Little Bunting Emberiza pusilla, has already been published (Brit. Birds 97: 647-664). Among the species considered here, American Wigeon and Night Heron Nycticorax nycticorax make their first appearance, since BBRC ceased to consider records of these two species at the end of 2001. In 2002, Green-winged Teals Anas carolinensis appeared in record numbers, it was the secondbest year on record for Ring-necked Duck Aythya collaris, White Stork Ciconia ciconia and Common Crane Grus grus, and the third-best for American Wigeon and Honey-buzzard Pernis apivorus. Conversely, the numbers of several other species, including Buff-breasted Sandpiper Tryngites subruficollis and Purple Heron Ardea purpurea, were some of the lowest recorded in recent years. As would be expected, however, most species occurred in roughly average numbers, showing no particular peaks or troughs. It is only by annual monitoring of these species, based upon records submitted to, and accepted by, local or regional records committees, that short-term anomalies and longterm trends can be detected. Readers are referred to the introduction to Part 1 of this report for fuller details of the nature of the records it contains. Compared with the case for most of thespecies covered in Part 1, it is notoriously difficult to assess the annual totals of certain species covered here, particularly (for example) some

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