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The mean number (+s.e.m.) of items re-cached in new and old sites at recovery after the observed and in private caching conditions for (a) birds that had previously stolen the caches of others (experienced birds; Wilcoxon's paired test, Z=2.2, n=7, p<0.05), and (b) birds that had not experienced stealing others' caches (naive birds; Wilcoxon's paired test, Z=1.6, n=7, p>0.05). *, p<0.05; ns, non-significant.
