The invasion of Northern BullfinchesP. p. pyrrhulato Britain in autumn 1994, with particular reference to the Northern Isles

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Abstract
The invasion of Northern Bullfinches P. p. pyrrhula to Britain, primarily the Northern Isles, in autumn 1994 is documented. The timing and magnitude of the influx is described, whilst ringing data are used to describe age and sex composition, body size and condition of migrants. Observations on feeding ecology are presented, and a comparison is made with previous invasions. The 1994 invasion was larger than any recorded previously in most areas. Almost 70% of migrants were first‐winters, and sex ratios varied throughout the Northern Isles, with more males found further north. The condition of adults was slightly better than first‐winter birds.