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Long-tailed Skua Stercorarius. longicaudus (L 36-42cm) recalls an Arctic Skua but is slimmer with much longer tail streamers in adult; long, pointed wings lack Arctic’s white patch. Adult has mainly grey-brown upperparts, dark cap and whitish neck and underparts; note faint yellow flush on cheeks. Juvenile is variably barred grey-brown, palest on nape and chest. Look for it during storms on Outer Hebrides in spring, Cornish coasts in autumn.