A study of Common Crossbills Loxia curvirostra in Scotland, shortly to be published in Ibis, has shown that the birds have different call types, recognisable on sonograms of tape-recorded calls. This finding matches the results of work carried out in North America and Europe, which demonstrates a hitherto unknown complexity among crossbill populations. Limited recording in England and Wales has revealed that at least two call types occur. In order to obtain a more detailed map of the distribution of these call types, I should be interested to hear from anyone in England, Wales, Ireland and southern Scotland who would be willing to help with this project. Please contact: Ron Summers, RSPB, Etive House, Beechwood Park, Inverness IV2 3BW; e-mail: [email protected]

Issue 3
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