September 1982 – vol. 75, issue 9, pp 395–406 The re-establishment of Isabelline Shrike Lanius Brown T Shrike L. cristatus and the Red-backed Shrike L. isabellinus,as separate collurio species (Voous 1977 & 1979; BOU Records Committee 1980) has rekindled interest in their field identification. Confusion persists regarding the taxonomy of the group (e.g. Nielsen 1981), but this should not inhibit discussion of plumage distinctions. Althoug... This article is only available to registered users.To read more, please log in or purchase a subscription.