Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleHEAD-SCRATCHING BY STONECHATS SAXICOLA TORQUATA.AuthorsGREIG-SMITH, P. W.PublicationIbis, 1979, Vol 121, Issue 4, p501ISSN0019-1019Publication typeArticleDOI10.1111/j.1474-919X.1979.tb06692.x