T H E I R R U P T I O N S O F Crossbills Loxia spp. into Britain in the summer and autumn of 1962 were described by Williamson (1963a), the account being supplemented by a list of records up to the end of the year (Williamson 1963b). The midsummer arrivals, mainly in late June and July, took place at the same time of year as all previous recorded largescale incursions into this country, and the bi...

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