May 1982 – vol. 75, issue 5, pp 224–225 This quite striking bird probably didn't immediately 'click' - it certainly didn't with me! It is obviously a tern, and it does not look large. But which one has such a bold pattern? The relatively large head, large eye and bulky wing do not suggest a marsh tern Chlidonias, and in any case the contrasted blackish lesser coverts forming the carpal bar indicate a sea tern Sterna in an immature or a... This article is only available to registered users.To read more, please log in or purchase a subscription.