130 chiffchaff overwintered at St Austell, 50 at Helston and 25 at Countess Weir. All the sites were "old fashioned" sewage works where the micro climate and lush vegetation ensure plenty of insects through the winter[1]
A male black lark at South Stack, Anglesey in June was initially thought to be Britain's first, and was seen by thousands of birders; it subsequently transpired that an earlier record, also a male, from Spurn, east Yorkshire in 1984 had just recently been accepted by the British Birds Rarities Committee, so making the South Stack bird Britain's second
A female redhead on Barra, Outer Hebrides from September through until April 2004 was Britain's third (but the first female).
Britain's third American coot occurred in Shetland in November and stayed into 2004.
An unprecedented movement of American robins in eastern North America on 8–9 November. Over 500,000 were recorded passing over Cape May after a deep low pressure system swept migrants into the north east of the United States[1]
References
1 2 Balmer, D. and Vickery, J. "Birds." In Branson, A. (2004) Wildlife Reports. British Wildlife 15: 204–7
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